Twentythree Zone

DsmbISP Final Exam Version 4.0

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1.Which three statements are true regarding the encapsulation and de-encapsulation of packets when traveling through a router? (Choose three.)
***The router modifies the TTL field, decrementing it by one.
The router changes the source IP to the IP of the exit interface.
***The router maintains the same source and destination IP.
***The router changes the source physical address to the physical address of theexit interface.
The router changes the destination IP to the IP of the exit interface.
The router sends the packet out all other interfaces, besides the one it enteredthe router on.

2.Refer to the exhibit. Packets destined to which two networks will require therouter to perform a recursive lookup? (Choose two.)
***10.0.0.0/8
64.100.0.0/16
128.107.0.0/16
172.16.40.0/24
192.168.1.0/24
***192.168.2.0/24

3.Which two statements are correct about the split horizon with poison reversemethod of routing loop prevention? (Choose two.)
It is enabled by default on all Cisco IOS implementations.
***It assigns a value that represents an infinite metric to the poisoned route.
***It sends back the poisoned route update to the same interface from where itwas received.
It instructs routers to hold all changes that might affect routes, for a specifiedperiod of time.
It limits the number of hops a packet can traverse through the network beforeit is discarded.

4.A network administrator has enabled RIP on routers B and C in the networkdiagram. Which of the following commands will prevent RIP updates from beingsent to Router A?
A(config)# router rip
A(config-router)# passive-interface S0/0
B(config)# router rip
B(config-router)# network 192.168.25.48

B(config-router)# network 192.168.25.64
A(config)# router rip
A(config-router)# no network 192.168.25.32
***B(config)# router rip
B(config-router)# passive-interface S0/0
A(config)# no router rip

5.Refer to the exhibit. Which two statements are true based on the exhibitedoutput? (Choose two.)
The administrative distance of EIGRP has been set to 50.
***All routes are stable.
***The show ip eigrp topology command has been run on R1.
The serial interface between the two routers is down.
Each route has one feasible successor.

6.Refer to the exhibit. Which three statements are true of the routing table forRouter1? (Choose three.)
The route to network 172.16.0.0 has an AD of 156160.
Network 192.168.0.16 can best be reached using FastEthernet0/0.
***The AD of EIGRP routes has been manually changed to a value other than thedefault value.
***Router1 is running both the EIGRP and OSPF routing process.
Network 172.17.0.0 can only be reached using a default route.
***No default route has been configured.

7.Which two router component and operation pair are correctly described?(Choose two.)
DRAM - loads the bootstrap
RAM - stores the operating system
Flash - executes diagnostics at bootup
***NVRAM - stores the configuration file
ROM - stores the backup configuration file
***POST - runs diagnostics on hardware modules
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Dsmbisp Chapter 9

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1.How many usable host addresses does the 192.168.1.0/25 subnet provide?
254
128
127
126***
64
62

2
A network technician has isolated a problem at the transport layer of the OSI
model. Which question would provide further information about the problem?
Do you have a firewall that is configured on your PC?***
Do you have a link light on your network card?
Is your PC configured to obtain addressing information using DHCP?
What default gateway address is configured in your TCP/IP settings?
Can you ping http://www.cisco.com?

3
Refer to the exhibit. A network administrator is in the process of sending a
preconfigured text file to a router. When the administrator pastes the
configuration into the router, an error message appears. What is the problem with
the IP addressing scheme?
Serial0/0 is configured with a network address.
The IP address on FastEthernet0/0 overlaps with the IP on FastEthernet0/1.
Serial0/1 is configured with a broadcast address.
The IP address on FastEthernet0/0 overlaps with the IP on Serial0/1.***



4
A user can access any web page on the Internet but cannot access e-mail. What
troubleshooting method would be most efficient for troubleshooting this issue?
top-down***
bottom-up
divide-and-conquer
impossible to determine from this information

5
Refer to the exhibit. What are two possible causes for the interface status?
(Choose two.)
The loopback address is not set.
The encapsulation type is mismatched.***
A cable is not attached to the interface.
Keepalive messages are not being received.***
The interface is administratively shut down.

6
Refer to the exhibit. Host H1 on the LAN is not able to access the FTP server
across the Internet. Which two configuration statements are causing this problem?
(Choose two.)
There is no route to the Internet.
The IP address on Fa0/0 is incorrect.
The IP address on S0/0/0 is incorrect.
The NAT command on the Fa0/0 interface is applied in the wrong direction.***
The NAT command on the S0/0/0 interface is applied in the wrong direction.***

7
Which two conditions identify issues that are confined to Layer 1? (Choose two.)
cables that exceed maximum length***
encapsulation errors
viruses and worms that create excessive broadcast traffic
poor termination of cables***
receiving "line protocol down" messages on the router console

8
A network administrator is upgrading a Cisco 1841 router by adding a WIC-2T module
card. Which show command can the administrator use to verify that the module is
correctly recognized by the router?
show flash:
show version***
show ip route
show startup-configuration

9
Hosts on two separate subnets cannot communicate. The network administrator
suspects a missing route in one of the routing tables. Which three commands can be
used to help troubleshoot Layer 3 connectivity issues? (Choose three.)
ping***
show arp
traceroute***
show ip route***
show controllers
show cdp neighbor

10
Refer to the exhibit. Which statement is true regarding the IP address
configuration?
Interfaces Fa0/0 and Fa0/1 can be in the same subnet.
Interface Fa0/0 and NetworkA can be in the same subnet.
Interface Fa0/0 and NetworkB can be in the same subnet.***
Interface Fa0/1 and NetworkB can be in the same subnet.

11
A network administrator plugs a new PC into a switch port. The LED for that port
changes to solid green. What statement best describes the current status of the
port?
There is a duplex mismatch error.
There is a link fault error. This port is unable to forward frames.
The port is operational and ready to transmit packets.***
This port has been disabled by management and is unable to forward frames.
The flash memory is busy.

12
Refer to the exhibit. Which three statements are true about the output of the show
ip interface brief command? (Choose three.)
FastEthernet0/0 is functioning correctly.***
The shutdown command has been applied on Serial0/0.***
FastEthernet0/0 was configured by the startup-config at bootup.
Serial0/0 is experiencing a Layer 1 network problem.
FastEthernet0/1 is experiencing a Layer 2 network problem.***
Because the port is down, Serial0/1 has an IP address that does not show in
the output.

13
Refer to the exhibit. Users on the 10.12.10.0/24 network are unable to access
anyone on the 10.10.10.0/24 network. What two problems exist in the network?
(Choose two.)
R2 is using a different version of RIP.***
R2 has a missing network statement.***
R1 has an incorrect network statement.
R3 has an incorrect network statement.
A routing loop is occurring between all three routers.

14
Refer to the exhibit. The PC is trying to ping router B at 192.168.2.2, but it
fails. What is the problem?
The PC is on the wrong subnet.
The default gateway on the PC should be 192.168.1.1.***
The default gateway should be 192.168.2.2.
The DNS server is incorrect.
The IP address for Fa0/0 on router A is incorrect.

15
An administrator is creating a lab to simulate a WAN connection. During the setup,
the administrator notices that there are different encapsulation types on each end
of the serial connection. At what layer of the OSI model is this problem
occurring?
Layer 2***
Layer 4
Layer 5
Layer 6

16
Refer to the exhibit. A router initially boots up to ROMMON mode. The
administrator enters the dir flash: command and sees the output that is shown.
What should the administrator do next?
Load a new IOS onto the router by the use of TFTP.
Load a new IOS onto the router via XMODEM.
Boot the router using the reset command in ROMMON.***
Erase the file in flash and reboot the router.

17
A PC is able to reach devices that are located both inside and outside the
network. However, when trying to reach an FTP server that is located on the same
subnet, the PC fails to make a connection. The administrator has several other PCs
that are located in the same subnet try a connection to the FTP server and they
are successful. Which troubleshooting tool can be used to determine the problem
between the PC and the FTP server?
cable tester
digital multimeter
protocol analyzer***
network analyzer

18
Refer to the exhibit. Which IP address is misconfigured and is causing
connectivity problems between hosts and servers?
HostA
HostB
Server1
Server2***
R1 Fa0/0
R1 Fa0/1

19
Which problem is associated with Layer 4 of the OSI model?
A firewall is blocking Telnet packets to a host.***
A host has an incorrect IP address.
A router has no route to a host.
A host sent a malformed HTTP request.

20
A user is having trouble accessing the Internet. A network administrator begins by
verifying that the IP address of the PC is correctly configured. Next the
administrator pings the default gateway. Based on this information, what type of
troubleshooting method is the administrator employing?
top-down
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DsmbISP Chapter 8

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1 Which AAA service reduces IT operating costs by providing detailed reporting and monitoring of network user behavior, and also by keeping a record of every access connection and device configuration change across the network? 

 authentication 
 accreditation 
 accounting 
 authorization 


2 Which three items are normally included when a log message is generated by a syslog client and forwarded to a syslog server? (Choose three.) 

 date and time of message 
 ID of sending device 
 length of message 
 message ID 
 checksum field 
 community ID 


3 What is the advantage of using WPA to secure a wireless network? 

 It uses a 128-bit pre-shared hexadecimal key to prevent unauthorized wireless access. 
 It uses an advanced encryption key that is never transmitted between host and access point. 
 It is supported on older wireless hardware, thus providing maximum compatibility with enterprise equipment. 
 It requires the MAC address of a network device that is requesting wireless access to be on a list of approved MAC addresses. 


4 A company wants to configure a firewall to monitor all channels of communication and allow only traffic that is part of a known connection. Which firewall configuration should be deployed? 

 packet filtering 
 proxy 
 stateful packet inspection 
 stateless packet inspection 


5 A server log includes this entry: User student accessed host server ABC using Telnet yesterday for 10 minutes. What type of log entry is this? 

 authentication 
 authorization 
 accounting 
 accessing 


6 What two measures help to verify that server backups have been reliably completed? (Choose two.) 

 reviewing backup logs 
 performing trial backups 
 performing full backups only 
 replacing tape backup with hard disk-based backup 
 using an autoloader when backups require more than one tape 

7 Which means of communication does an SNMP network agent use to provide a network management station with important but unsolicited information? 

 query 
 broadcast 
 ICMP ping 
 trap 
 poll 


8 Which three protocols are used for in-band management? (Choose three.) 

 FTP 
 HTTP 
 SNMP 
 Telnet 
 TFTP 
 DHCP 


9 A hacker has gained access to sensitive network files. In analyzing the attack, it is found that the hacker gained access over a wireless segment of the network. It is further discovered that the only security measure in place on the wireless network is MAC Address Filtering. How is it likely that the hacker gained access to the network? 

 The hacker used a software tool to crack the shared hexadecimal wireless key. 
 The hacker obtained the MAC address of a permitted host, and cloned it on his wireless laptop NIC. 
 The attacker mounted a denial of service attack to overwhelm the firewall before penetrating the wireless LAN. 
 The hacker gained wireless access to the MAC address database and added his own MAC address to the list of permitted addresses. 


10 A network administrator is assigning network permissions to new groups of users and employing the principle of least privilege. Which two actions should the administrator take? (Choose two.) 

 Provide users with only the access to resources required to do their jobs. 
 Provide the minimum level of permissions required for users to do their jobs. 
 Remove all permissions from the users and grant permissions as they are requested. 
 Allow users to decide how much permission they need to accomplish their job tasks. 
 Provide full access to the users and gradually remove privileges over time. 


11 Which three protocols describe methods that can be used to secure user data for transmission across the internet? (Choose three.) 

 SMTP 
 IPSEC 
 SSL 
 HTTPS 
 FTP 
 TFTP 


12 Which benefit does SSH offer over Telnet when remotely managing a router? 

 encryption 
 TCP usage 
 authorization 
 connection using six VTY lines 


13 Which of the following does SNMP use to hold information collected about the network? 

 network management station 
 network management database 
 management information base 
 database information agent 


14 What are two potential problems with using tape media to back up server data? (Choose two.) 

 Tape is not a cost-effective means of backing up data. 
 Data tapes are difficult to store offsite. 
 Data tapes are prone to failure and must be replaced often. 
 Tape drives require regular cleaning to maintain reliability. 
 Backup logs are not available with tape backup solutions. 


15 What is the term for the public network between the boundary router and the firewall? 

 "clean" LAN 
 intranet 
 DMZ 
 extranet 


16 Which two characteristics of network traffic are being monitored if a network technician configures the company firewall to operate as a packet filter? (Choose two.) 

 applications 
 physical addresses 
 packet size 
 ports 
 protocols 


17 When is the use of out-of-band network management necessary? 

 when a server needs to be monitored across the network 
 when the management interface of a device is not reachable across the network 
 when enhanced monitoring features are required to gain an overall view of the entire network 
 when it is desirable to use the information that is provided by SNMP 


18 What network layer security protocol can secure any application layer protocol used for communication? 

 HTTPS 
 IMAP 
 FTPS 
 IPSEC 
 TLS 


19 Before a technician upgrades a server, it is necessary to back up all data. Which type of backup is necessary to ensure that all data is backed up? 

 daily 
 differential 
 full 
 incremental 
 partial 


20 What AAA component assigns varying levels of rights to users of network resources? 

 auditing 
 accounting 
 authorization 
 access control 
 authentication 
 acknowledgement 
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DsmbISP Chapter 7

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Q.1 Which two statements are true about the OSI and TCP/IP models? (Choose two.) 

 The two bottom layers of the TCP/IP model make up the bottom layer of the OSI model. 
 The TCP/IP model is a theoretical model and the OSI model is based on actual protocols. 
 The OSI network layer is comparable to the Internet layer of the TCP/IP model. 
 The TCP/IP model specifies protocols for the physical network interconnection. 
 The TCP/IP model is based on four layers and the OSI model is based on seven layers. 


Q.2 To meet customer expectations, an ISP must guarantee a level of service that is based on what two factors? (Choose two.) 

 accessibility 
 adaptability 
 availability 
 reliability 
 scalability 


Q.3 User1 is sending an e-mail to User2@cisco.com. What are two characteristics of the process of sending this data? (Choose two.) 

 It utilizes TCP port 110. 
 A TCP connection is established directly between the User1 and User2 client computers in order to send the e-mail message. 
 It utilizes a store and forward process. 
 The same application layer protocol is used to send the e-mail and retrieve it from the destination server. 
 SMTP is used to send the e-mail message to the mail servers. 


schéma1 
Q.4 Refer to the exhibit. Host1 is in the process of setting up a TCP session with Host2. Host1 has sent a SYN message to begin session establishment. What happens next? 

 Host1 sends an ACK message to Host2. 
 Host1 sends a SYN message to Host2. 
 Host1 sends a SYN-ACK message to Host2. 
 Host2 sends an ACK message to Host1. 
 Host2 sends a SYN message to Host1. 
 Host2 sends a SYN-ACK message to Host1. 


Q.5 What are three characteristics of network reliability? (Choose three.) 

 Redundant hardware provides enhanced reliability. 
 Reliability is measured as a percent. 
 Reliability is the responsibility of the ISP customers. 
 Fault tolerance is a measure of reliability. 
 The longer the MTBF, the greater the reliability. 


Q.6 Which two statements describe the FTP protocol? (Choose two.) 

 It uses well-known port 23. 
 The protocol interpreter is responsible for the data transfer function. 
 In passive data connections, the FTP client initiates the transfer of data. 
 It requires two connections between client and server. 
 FTP servers open a well-known port on the client machine. 
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DsmbISP Chapter 6

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Q.1 Which command is used to view the RIP routing protocol settings and configuration? 

 show version 
 show ip route 
 show interface 
 show ip protocols 

schéma1 
Q.2 Refer to the exhibit. What is the maximum number of RIP routers that could separate HostA and HostB and still leave the hosts with connectivity to each other? 

 14 
 15 
 16 
 17 


Q.3 In which situation would a company register for its own autonomous system number (ASN)? 

 when the company's ISP adds connection points to the Internet 
 when additional routers are added to the corporate internetwork 
 when more than one interior routing protocol is used 
 when the company uses two or more ISPs 


Q.4 Consider this routing table entry 

R 172.16.1.0/24 [120/1] via 200.1.1.1 00:00:27 Serial0/1 

What type of route is this? 
 a static route 
 a default route 
 a RIP route 
 an OSPF route 
 an EIGRP route 
 a directly-connected route 


Q.5 What is the difference between interior and exterior routing protocols? 

 Exterior routing protocols are only used by large ISPs. Interior routing protocols are used by small ISPs. 
 Interior routing protocols are used to route on the Internet. Exterior routing protocols are used inside organizations. 
 Exterior routing protocols are used to administer a single autonomous system. Interior routing protocols are used to administer several domains. 
 Interior routing protocols are used to communicate within a single autonomous system. Exterior routing protocols are used to communicate between multiple autonomous systems. 


Q.6 What information is included in RIPv2 routing updates that is not included in RIPv1 updates? 

 metric 
 subnet mask 
 area identification 
 hop count 
 autonomous system number 


Q.7 Which routing protocol is used to exchange data between two different ISPs? 

 BGP 
 EIGRP 
 OSPF 
 RIP v2 

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DsmbISP chapter 5

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Q.1 In what two ways does SDM differ from the IOS CLI? (Choose two.) 

 SDM is used for in-band management only. The IOS CLI can be used for in-band and out-of-band management. 
 SDM is accessed through a Telnet application. The IOS CLI is accessed through a web browser. 
 SDM is available for all router platforms. The IOS CLI is available for a limited number of Cisco devices. 
 SDM utilizes GUI buttons and text boxes. The IOS CLI requires the use of text-based commands. 
 SDM is used for advanced configuration tasks. The IOS CLI is preferred for initial basic device configuration. 


Q.2 Which mode will a configured router display at login? 

 global configuration mode 
 setup mode 
 ROM monitor mode 
 user EXEC mode 


schéma1 
Q.3 Refer to the exhibit. Which password or passwords will be encrypted as a result of the configuration that is shown? 

 virtual terminal only 
 enable mode only 
 console and virtual terminal only 
 enable mode and virtual terminal 
 only the service password 
 all configured passwords 


schéma2 
Q.4 Refer to the exhibit. Which three sets of commands are required to enable administrators to connect to the Switch1 console over Telnet for configuration and management? (Choose three.) 

 Switch1(config)# interface fa0/1 
     Switch1(config-if)# ip address 192.168.2.64 255.255.255.192 
 Switch1(config)# interface fa0/1 
     Switch1(config-if)# ip address 192.168.2.66 255.255.255.192 
 Switch1(config)# interface vlan 1 
     Switch1(config-if)# ip address 192.168.2.126 255.255.255.192 
     Switch1(config-if)# no shutdown 
 Switch1(config)# line vty 0 4 
     Switch1(config-line)# enable password cisco 
     Switch1(config-line)# login 
 Switch1(config)# line vty 0 15 
     Switch1(config-line)# password cisco 
     Switch1(config-line)# login 
 Switch1(config)# ip default-gateway 192.168.2.65 


Q.5 How does the SYST LED on the catalyst 2960 switch indicate a POST failure? 

 blinks rapidly amber 
 blinks rapidly green 
 steady amber 
 steady green 
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DsmbISP Chapter 4

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Q.1 In an 8 bit binary number, what is the total number of combinations of the eight bits? 

 128 
 254 
 255 
 256 
 512 
 1024 


Q.2 Convert the decimal number 231 into its binary equivalent. Select the correct answer from the list below. 

 11110010 
 11011011 
 11110110 
 11100111 
 11100101 
 11101110 


Q.3 How many usable hosts are available given a Class C IP address with the default subnet mask? 

 254 
 255 
 256 
 510 
 511 
 512 


Q.4 Which statement describes NAT overload or PAT? 

 Each internal address is dynamically translated to an individual external IP address. 
 A single internal address is always translated to the same unique external IP address. 
 Many internal addresses can be translated to a single IP address using different port assignments. 
 Many internal addresses are statically assigned a single IP address and port to use for communications. 


Q.5 Which IPv4 class of addresses provides the most networks? 

 Class A 
 Class B 
 Class C 
 Class D 
 Class E 


Q.6 Which statement accurately describes public IP addresses? 

 Public addresses cannot be used within a private network. 
 Public IP addresses must be unique across the entire Internet. 
 Public addresses can be duplicated only within a local network. 
 Public IP addresses are only required to be unique within the local network. 
 Network administrators are free to select any public addresses to use for network devices that access the Internet. 


Q.7 Which two statements describe classful IP addresses? (Choose two.) 

 It is possible to determine which class an address belongs to by reading the first bit. 
 The number of bits used to identify the hosts is fixed by the class of the network. 
 Only Class A addresses can be represented by high-order bits 100. 
 Up to 24 bits can make up the host portion of a Class C address. 
 Up to 24 bits can be used to identify unique networks. 
 Three of the five classes of addresses are reserved for multicasts and experimental use. 


Q.8 Company XYZ uses a network address of 192.168.4.0. It uses the mask of 255.255.255.224 to create subnets. What is the maximum number of usable hosts in each subnet? 

 6 
 14 
 30 
 62 


Q.9 hat is the network broadcast address for a Class C address of 192.168.32.0 with the default subnet mask? 

 192.168.0.0 
 192.168.0.255 
 192.168.32.0 
 192.168.32.254 
 192.168.32.255 
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DsmbISP Chapter 3

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Q.1 Which two benefits can be gained by locating network equipment in a telecommunications closet, rather than in a user area? (Choose two.) 

faster communication speeds 
√improved physical security 
more resistant to hacker attempts 
√centralized cable management 
less electrical usage 


Q.2 Which three issues should be noted on the technician's site survey report? (Choose three.) 

√unlabeled cables 
only two power outlets per wall in each room 
√poor physical security of network devices 
horizontal cabling runs under 100 meters 
√lack of UPS for critical devices 
two users sharing the same computer 


Q.3 Which two types of cable are used for initial router configuration? (Choose two.) 

serial cable 
√rollover cable 
straight-through cable 
crossover cable 
patch cable 
√console cable 


Q.4 In addition to the inventory sheet, what other information about the hosts and networking equipment should be documented by the on-site technician while performing the site survey? 

any obsolete office equipment being stored 
all product keys for site license software 
√any planned growth anticipated in the near future 
the memory requirements for installed application software 


schéma1
Q.5 Refer to the exhibit. What type of device is used to connect two networks? 

hub 
√router 
switch 
access point 


Q.6 It is said that the goal for availability of a communications system is "five-9s". What is meant by this? 

A down time of .00001% is unacceptable. 
√A network needs to be available 99.999% of the time. 
Five percent of all network expense covers 99% of user requirements. 
The most critical time for network availability is from 9:00 to 5:00 p.m. five days a week. 
The best time to do maintenance on a network is from 5:00 p.m. to 9:00 a.m. five days a week. 


Q.7 What three things are included in a logical topology document? (Choose three.) 

the location of cables, computers, and other peripherals 
√the path that the data takes through a network 
the wireless signal coverage area 
the wiring closet and access point locations 
√the device names and Layer 3 addressing information 
√the location of routing, network address translation, and firewall filtering 


Q.8. Which device has the ability to break up broadcast and collision domains? 

repeater 
hub 
√router 
switch 


Q.9 Why is it important to review the results of an on-site survey report with the customer before beginning the network design? 

to inform the customer of how much time the upgrade will take 
to discuss the implementation schedule for the new equipment 
√to verify that the report accurately describes the current network and any plans for expansion 
to layout the new network design and discuss possible equipment upgrades and replacements 

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DsmbISP Chapter 2

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1.The DHCP server in a lab environment is down when multiple DHCP clients in the lab are
 booted for the first time. Which two statements describe how the DHCP clients will be
 affected by the absence of a DHCP server during boot? (Choose two.)
The clients will not boot completely until the DHCP server resumes functioning.
The clients will attempt via the use of the IP address 127.0.0.1 to communicate with the 
other clients.
All clients with link-local addresses will communicate with each other in a peer-to-peer manner.
A link-local address will be automatically assigned to the hosts by the operating system.
A link-local process will use a DNS query to determine if any other device uses the same 
link-local address.
Scoring Rule For:  correctness of response
Option 3 and Option 4 are correct.
1 point for each correct option.
0 points if more options are selected than required.
Max Value = 2
2
Which is a function of the transport layer of the OSI model?
routes data between networks
converts data to bits for transmission
delivers data reliably across the network using TCP
formats and encodes data for transmission
transmits data to the next directly connected device
Scoring Rule For:  correctness of response
2 points for Option 3
0 points for any other option
Max Value = 2
3
Which statement describes the process of escalating a help desk trouble ticket?
The help desk technican resolves the customer problem over the phone and closes the 
trouble ticket.
Remote desktop utilities enable the help desk technician to fix a configuration error and 
close the trouble ticket.
After trying unsuccessfully to fix a problem, the help desk technician sends the trouble 
ticket to the onsite support staff.
When the problem is solved, all information is recorded on the trouble ticket for future
 reference.
Scoring Rule For:  correctness of response
2 points for Option 3
0 points for any other option
Max Value = 2
4
Which two functions are provided by the upper layers of the OSI model? (Choose two.)
placing electrical signals on the medium for transmission
initiating the network communication process
encrypting and compressing data for transmission
segmenting and identifying data for reassembly at the destination
choosing the appropriate path for the data to take through the network
Scoring Rule For:  correctness of response
Option 2 and Option 3 are correct.
1 point for each correct option.
0 points if more options are selected than required.
Max Value = 2
5
Which scenario represents a problem at Layer 4 of the OSI model?
An incorrect IP address on the default gateway.
A bad subnet mask in the host IP configuration.
A firewall filtering traffic addressed to TCP port 25 on an email server.
An incorrect DNS server address being given out by DHCP.
Scoring Rule For:  correctness of response
2 points for Option 3
0 points for any other option
Max Value = 2
6
A customer calls to report a problem accessing an e-commerce web site. The help 
desk technician begins troubleshooting using a top-down approach. Which question 
would the technician ask the customer first?
Can you access other web sites?
Is there a firewall installed on your computer?
What is your IP address?
Is the link light lit on your NIC card?
Scoring Rule For:  correctness of response
2 points for Option 1
0 points for any other option
Max Value = 2
7
What are two primary goals of the ISP help desk? (Choose two.)
conserving support resources
network optimization
competitive scalability
customer retention
Scoring Rule For:  correctness of response
Option 2 and Option 4 are correct.
1 point for each correct option.
0 points if more options are selected than required.
Max Value = 2
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