Ccna 2 Discovery Final V4.1

Take Assessment - DsmbISP Final Exam - CCNA Discovery: Working at a Small-to-Medium Business or ISP (Version 4.1) May 14, 2009

1

What are two purposes of DNS? (Choose two.)

to dynamically assign IP addressing information to network hosts

to simplify the administration of host and default gateway addressing on client computers

to assign TCP port numbers to hosts as part of the data transfer process

to resolve human-readable domain names to numeric IP addresses

to replace the static HOSTS file with a more practical dynamic system

2

Refer to the exhibit. The network administrator uses the command below to configure a default route on RTB: RTB(config)# ip route 0.0.0.0 0.0.0.0 fa0/0 A ping issued from PC3 is successful to RTB. However, echo request packets arrive at PC1 but the echo replies do not make it back to PC3. What will fix this problem?

RTA must be configured to forward packets to the 192.168.2.0 network.

The ip route command needs to be edited so that the next hop address is 10.1.1.5.

The ip route command needs to be edited so that the 192.168.2.1 address is the next hop address.

The ip route command should be removed from the RTB router configuration.

Another default route should be configured on RTA with a next hop address of 10.1.1.6.

3

Refer to the exhibit. A NOC technician at an ISP enters the command c:\ping 209.165.201.7. What are two reasons to use this command? (Choose two.)

map the path to 209.165.201.7

test reachability to 209.165.201.7

locate connectivity problems along the route to 209.165.201.7

identify ISPs that interconnect the NOC and remote host with IP 209.165.201.7

measure the time that packets take to reach 209.165.201.7 and return to the technician's workstation

4

How does TCP ensure the reliable transfer of data?

If data segments are not received from the source, the destination requests that the segments be resent.

If an acknowledgment of the transmitted segments is not received from the destination in a predetermined amount of the time, the source resends the data.

TCP uses the SYN-ACK portion of the three-way handshake to ensure that all data has been received.

The TCP Protocol Interpreter process verifies the transmitted data at source and destination.

5

A new router is connected to an existing network. Which two tasks must be completed on the new router to include it in the dynamic routing process? (Choose two.)

Enter the new network IP address on all existing routers.

Assign an appropriate IP address and subnet mask to the serial interface.

Update the ip host configuration information with the device name and new interface IP address.

Configure a routing protocol with the directly connected network IP addresses.

Configure a routing protocol to include all networks from all existing routers.

6

When customers use credit cards to make purchases at a small business, a modem is heard dialing a telephone number to transfer the transaction data to the central office. What type of WAN serial connection is in use?

leased line

packet switched

circuit switched

point-to-point

7

A hacker attempts to reach confidential information that is stored on a server inside the corporate network. A network security solution inspects the entire packet, determines that it is a threat, and blocks the packet from entering the inside network. Which security measure protected the network?

an IDS

an IPS

a host-based firewall

Anti-X software

8

A network administrator is configuring a DTE serial interface on a 1841 router. The serial interface is installed in the first controller, second slot, first port, with an IP address from the 192.168.1.8 /30 network. Which set of commands correctly configures this interface?

Router(config)# interface serial 0/0/0 Router(config-if)# ip address 192.168.1.10 255.255.255.252 Router(config-if)# clock rate 64000 Router(config-if)# no shutdown

Router(config)# interface serial 0/1/1 Router(config-if)# ip address 192.168.1.10 255.255.255.252 Router(config-if)# clock rate 64000 Router(config-if)# no shutdown

Router(config)# interface serial 0/1/0 Router(config-if)# ip address 192.168.1.10 255.255.255.252 Router(config-if)# no shutdown

Router(config)# interface serial 1/2/1 Router(config-if)# ip address 192.168.1.10 255.255.255.252 Router(config-if)# no shutdown

9

A company is developing an Internet store for its website. Which protocol should be used to transfer credit card information from customers to the company web server?

FTPS

HTTP

HTTPS

WEP2

TFTP

10

Refer to the exhibit. The diagram that is shown represents the network of a manufacturing company with its headquarters at one end of a city and its warehouse at the other end. These two locations are connected via a T1 line. How will the Fohi router dynamically learn routes to the 192.168.16.16/28, 192.168.16.32/28, and 192.168.16.64/28 subnetworks?

with BGP

with a static route

with a directly connected route

with an interior routing protocol

21

Refer to the exhibit. The network administrator has configured the RTA and RTB interfaces. In order to allow hosts that are attached to RTA to reach the server that is attached to RTB, a static route from RTA to the server LAN and a default route from RTB back to RTA need to be configured. Which two commands will the administrator use to accomplish these tasks on the two routers? (Choose two.)

RTA(config)# ip route 10.16.10.5 255.255.255.252 10.16.10.6

RTA(config)# ip route 0.0.0.0 0.0.0.0 10.16.10.6

RTA(config)# ip route 10.16.10.96 255.255.255.252 10.16.10.6

RTB(config)# ip route 10.16.10.6 255.255.255.248 10.16.10.6

RTB(config)# ip route 0.0.0.0 0.0.0.0 S0/0/1

RTB(config)# ip route 0.0.0.0 0.0.0.0 10.16.10.6

22 What are three characteristics of the TCP protocol? (Choose three.)

exchanges datagrams unreliably

is used to send IP error messages

forces the retransmission of unacknowledged packets

creates a virtual session between end-user applications

carries the IP address of the destination host in the TCP header

is responsible for breaking messages into segments and reassembling them at their destination

23

A user is attempting to do an http://www.cisco.com/ without success. Which two configuration values must be set on the host to allow this access? (Choose two.)

DNS server

WINS server

HTTP server

default gateway

Netbios

24

A network administrator is asked to design a system to allow simultaneous access to the Internet for 250 users. The ISP can only supply five public IP addresses for this network. What technology can the administrator use to accomplish this task?

classful subnetting

variable length subnet masks

classless interdomain routing

port-based Network Address Translation

25

A client at a workstation with IP address 192.168.1.201/24 connects to a web server with IP address 192.168.1.254/24. Which two statements describe the transmission of a request for a web page as it is sent from the web browser to the web server? (Choose two.)

The transport layer protocol is TCP.

The source socket is 192.168.1.201:80.

The destination socket is 192.168.1.254:80.

The destination port is a number higher than 1024.

The request is sent as a response to a transmission from the server.

26

Refer to the exhibit. The network administrator needs to configure the Fa0/0 interface of RTB so that hosts from RTA can connect to the server that is attached to RTB. Which two commands will the administrator use to accomplish this task? (Choose two.)

RTB# ip address 192.168.102.98 255.255.255.248

RTB(config-if)# ip address 192.168.102.99 255.255.255.252

RTB(config)# ip address 192.168.102.97 255.255.255.252

RTB(config)# no shutdown

RTB(config-if)# no shutdown

RTB(config-if)# ip address 192.168.102.97 255.255.255.252

27

Refer to the exhibit. Which combination of cables and symbols is correct?

A - crossover, B - straight-through, C - straight-through

A - crossover, B - rollover, C - straight-through

A - straight-through, B -crossover, C - straight-through

A - straight-through, B -straight-through, C - straight-through

A - straight-through, B - straight-through, C - crossover

A - rollover, B - straight-through, C - straight-through

28 A network technician is using a network management station to gather data about the performance of devices and links within the ISP. Which application layer protocol makes this possible?

SNMP

FTP

DHCP

SMTP

29

How does a switch interface that uses sticky port security handle MAC addresses?

The addresses are configured manually and are saved in the running configuration.

They are configured manually and are not saved in the running configuration.

They are configured dynamically and are saved in the running configuration.

They are configured dynamically and are not saved in the running configuration.

31

Refer to the exhibit. Which type of UTP cable should be used to connect Host A to Switch1?

rollover

console

crossover

straight-through

32

Refer to the exhibit. A ping 192.168.1.20 command is issued on workstation A to determine if workstation B can be reached. What two events will occur if this command is successful? (Choose two.)

The router will reply to the echo request with a proxy ping response.

Workstation A will send a UDP ping request message to workstation B.

The router will send a TCP acknowledgment message to workstation A.

Workstation B will send a UDP ping reply message to the router.

Workstation A will send an ICMP echo request message to workstation B.

Workstation B will send an ICMP echo reply message to workstation A.

33

Refer to the exhibit. Based on the output of the show ip route command, how many hops are between this router and the 192.168.3.0 network?

3

4

5

120

34

Which two commands ensure that any password that permits access to the privileged EXEC mode is not shown in plain text when the configuration files are displayed? (Choose two.)

Router(config)# enable secret cisco

Router(config)# enable cisco

Router(config)# encryption-password all

Router(config)# enable login encrypted

Router(config)# enable password encryption

Router(config)# service password-encryption

35

Why are port numbers included in the TCP header of a segment?

to indicate the correct router interface that should be used to forward a segment

to identify which switch ports should receive or forward the segment

to determine which Layer 3 protocol should be used to encapsulate the data

to enable a receiving host to forward the data to the appropriate application

to allow the receiving host to assemble the packet in the proper order

36

Which two subnet masks could be used when subnetting a Class B IP address? (Choose two.)

255.255.255.240

255.255.192.0

255.255.0.0

255.192.0.0

240.0.0.0

255.0.0.0

37

Which two statements are true about the use of the debug ip rip command on a Cisco router? (Choose two.)

The debug ip rip command displays RIP routing activity in real time.

The debug ip rip command can be issued at the user EXEC configuration mode.

The debug ip rip command displays a combination of the information that is displayed by the show ip route and show ip protocols commands.

Because of router processor usage, the debug ip rip command should be used only when necessary.

The debug ip rip command should be used instead of the show ip route command whenever possible.

38

Which mode does a router enter when no configuration file is located in NVRAM?

ROMMON

setup

global configuration

privileged exec

39

A customer reports connectivity problems to an ISP technician. Upon questioning the customer, the technician discovers that all network applications are functioning except for FTP. What should the technician suspect is the problem?

misconfigured firewall

bad port on switch or hub

misconfigured IP addressing on the customer's workstation

wrong DNS server configured on the customer's workstation

wrong default gateway configured on the customer's workstation

40

The show ip route command was executed on one of the routers shown in the graphic and the following output was displayed: C 192.168.4.0/24 is directly connected, Serial0/0 R 192.168.5.0/24 [120/1] via 192.168.4.2, 00:00:19, Serial0/0 R 192.168.1.0/24 [120/2] via 192.168.3.1, 00:00:20, Serial0/1 R 192.168.2.0/24 [120/2] via 192.168.3.1, 00:00:20, Serial0/1 C 192.168.3.0/24 is directly connected, Serial0/1 From which router was this command executed?

A

B

C

D

41

Refer to the exhibit. The network administrator of the building in the graphic needs to choose the type of cable best suited to add ServerB to the network. Which cable type is the best choice?

STP

UTP

coaxial

fiber optic

42

Refer to the exhibit. Which two statements describe the data conversation shown? (Choose two.)

The data conversation was started by the HTTP application process running on the client.

The data conversation is identified by TCP port 80 on the client.

The user started the data conversation by sending an e-mail.

The IP address of the Internet server is 192.168.17.43.

The Internet server will send data to port 8547 on the client.

43

Refer to the exhibit. What two conclusions can be drawn about router RTB? (Choose two.)

The router is connected to a router named Boise.

Router RTB is connected to a Cisco 1841 router.

Router RTB is directly connected to two other routers.

The IP address of the router interface that is connected to router RTB is 192.168.2.6.

The RTB router is connected to two Cisco devices by FastEthernet links.

44

Refer to the exhibit. A new branch office has been added to the corporate network and a new router is to be installed to allow branch office users to access the database server at headquarters. How should the serial 0/0/0 interface of the new branch office router be configured to connect to the headquarters router?

branch_23(config-if)# ip address 192.168.5.19 255.255.255.240 branch_23(config-if)# no shutdown

branch_23(config-if)# encapsulation hdlc branch_23(config-if)# ip address 192.168.5.25 255.255.255.240 branch_23(config-if)# no shutdown

branch_23(config-if)# encapsulation ppp branch_23(config-if)# no shutdown

branch_23(config-if)# encapsulation ppp branch_23(config-if)# ip address 192.168.5.33 255.255.255.240

branch_23(config-if)# encapsulation ppp branch_23(config-if)# ip address 192.168.5.21 255.255.255.240 branch_23(config-if)# no shutdown

45 A Catalyst switch is used as a temporary replacement for another switch that needs to be repaired. About a minute after the switch has started, the SYST LED on the front of the switch transitions from blinking green to amber. What is the meaning of the amber SYST LED?

The switch has no configuration file in NVRAM.

The switch has failed POST and must be sent for service.

The switch is functioning properly.

The switch is in half-duplex mode.

46

Refer to the exhibit. A user who is connected to RTA is trying to telnet to RTB, but the connection is failing. Based on the output of the show running-config command on router RTB, why is the Telnet session failing?

Telnet has not been configured on the console line.

The login command has not been issued on the console line.

No password has been configured on the VTY lines.

A session limit has not been configured for Telnet.

47

Refer to the graphic. Which command will configure a static route on Router A to direct traffic from LAN A that is destined for LAN C?

RouterA(config)# ip route 192.168.4.0 255.255.255.0 192.168.5.2

RouterA(config)# ip route 192.168.4.0 255.255.255.0 192.168.3.2

RouterA(config)# ip route 192.168.5.0 255.255.255.0 192.168.3.2

RouterA(config)# ip route 192.168.3.0 255.255.255.0 192.168.3.1

RouterA(config)# ip route 192.168.3.2 255.255.255.0 192.168.4.0

48

Which type of address is 192.168.17.111/28?

host address

network address

broadcast address

multicast address

49

Refer to the exhibit. Which subnet mask would accommodate the number of hosts indicated for all subnets if the major network address was 192.168.25.0/24?

255.255.0.0

255.255.224.0

255.255.255.0

255.255.255.224

255.255.255.240

255.255.255.248

50

Which two protocols allow network devices to report their status and events to a centralized network management device? (Choose two.)

Telnet

HTTP

HTTPS

SNMP

51

How do port filtering and access lists help provide network security?

They prevent specified types of traffic from reaching specified network destinations.

They alert network administrators to various type of denial of service attacks as they occur.

They prevent viruses, worms, and Trojans from infecting host computers and servers.

They enable encryption and authentication of confidential data communications.

52

Refer to the exhibit. The PC tries to ping router B at 192.168.2.2, but the ping fails. What is the problem?

The address of the PC is on the wrong subnet.

The subnet mask of the PC should be 255.255.255.0.

The default gateway should be 192.168.2.1.

The DNS server is incorrect.

53

How many host addresses may be assigned on each subnetwork when using the 130.68.0.0 network address with a subnet mask of 255.255.248.0?

30

256

2046

2048

4094

4096

54

A user reports being unable to access the Internet. The help desk technician employs a bottom-up approach to troubleshooting. The technician first has the user check the patch cable connection from the PC to the wall, and then has the user verify that the NIC has a green link light. What will the technician have the user do next?

Enter an IP address into the WWW browser address bar to see if DNS is at fault.

Use traceroute to identify the device along the path to the ISP that may be at fault.

Verify the IP address, subnet, and gateway settings using ipconfig on the PC.

Connect to the user home router to check firewall settings for blocked TCP ports.

55

Refer to the exhibit. Both R1 and R2 are performing static NAT translations for their inside networks. A packet is sent from HostA to the web server. What are the source and destination IP addresses when the frame is located at position "A" as displayed in the exhibit?

Source: 10.1.1.2 Destination: 172.30.20.100

Source: 10.1.1.2 Destination: 192.168.1.2

Source: 172.30.20.1 Destination: 172.30.20.2

Source: 172.30.20.10 Destination: 172.30.20.100

Source: 172.30.20.10 Destination: 192.168.1.2

56 What is used by a routing protocol to determine the best path to include in the routing table?

Convergence time

Default distance

Metric

Type of router

57

Refer to the exhibit. A network administrator is troubleshooting the serial connection between R1 and R2. There is no communication between R1 and R2. Based on the output of the show ip interface brief command, what is the cause of the problem?

There is a misconfiguration of IP addresses.

There is a mismatch of encapsulation methods.

The no shutdown command should be issued on R2.

The routing protocols are not compatible.

58

Which two processes enable a router to determine paths to destination networks? (Choose two.)

inspection of the source IP address in data packets

ARP requests from connected routers

manual configuration of routes

updates from other routers

DHCP information broadcasts

updates from the SMTP management information base