Final mod 2

8/7/2019 Final mod 2

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Take Assessment - DsmbISP Final Exam - CCNA Discovery: Working at aSmall-to-Medium Business

or ISP (Version 4.1) May 14, 2009

1What are two purposes of DNS? (Choose two.)

to dynamically assign IP addressing information to network hoststo simplify the administration of host and default gateway addressing on client computersto assign TCP port numbers to hosts as part of the data transfer processto resolve human-readable domain names to numeric IP addressesto 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 defaultroute on RTB:RTB(config)# ip route 0.0.0.0 0.0.0.0 fa0/0A ping issued from PC3 is successful to RTB. However, echo request packets arrive at PC1 but theecho 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 hopaddress.

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.


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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 209.165.201.7test reachability to 209.165.201.7locate connectivity problems along the route to 209.165.201.7identify ISPs that interconnect the NOC and remote host with IP 209.165.201.7measure the time that packets take to reach 209.165.201.7 and return to the technician'sworkstation

4How does TCP ensure the reliable transfer of data?

If data segments are not received from the source, the destination requests that the segments beresent.If an acknowledgment of the transmitted segments is not received from the destination in apredetermined 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 beenreceived.

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

5A new router is connected to an existing network. Which two tasks must be completed on the newrouter 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.

6When customers use credit cards to make purchases at a small business, a modem is heard dialinga telephone number to transfer the transaction data to the central office. What type of WAN serialconnection is in use?

leased linepacket switchedcircuit switchedpoint-to-point

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

an IDSan IPS

a host-based firewallAnti-X software

8A network administrator is configuring a DTE serial interface on a 1841 router. The serial interfaceis installed in the first controller, second slot, first port, with an IP address from the 192.168.1.8 /30network. Which set of commands correctly configures this interface?

Router(config)# interface serial 0/0/0Router(config-if)# ip address 192.168.1.10 255.255.255.252Router(config-if)# clock rate 64000

Router(config-if)# no shutdownRouter(config)# interface serial 0/1/1Router(config-if)# ip address 192.168.1.10 255.255.255.252Router(config-if)# clock rate 64000Router(config-if)# no shutdownRouter(config)# interface serial 0/1/0Router(config-if)# ip address 192.168.1.10 255.255.255.252Router(config-if)# no shutdownRouter(config)# interface serial 1/2/1Router(config-if)# ip address 192.168.1.10 255.255.255.252Router(config-if)# no shutdown

9A 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?

FTPSHTTPHTTPSWEP2

TFTP

10

Refer to the exhibit. The diagram that is shown represents the network of a manufacturingcompany with its headquarters at one end of a city and its warehouse at the other end. These twolocations are connected via a T1 line. How will the Fohi router dynamically learn routes to the192.168.16.16/28, 192.168.16.32/28, and 192.168.16.64/28 subnetworks?

with BGP

with a static routewith a directly connected routewith an interior routing protocol


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

RTA(config)# ip route 10.16.10.5 255.255.255.252 10.16.10.6RTA(config)# ip route 0.0.0.0 0.0.0.0 10.16.10.6RTA(config)# ip route 10.16.10.96 255.255.255.252 10.16.10.6RTB(config)# ip route 10.16.10.6 255.255.255.248 10.16.10.6RTB(config)# ip route 0.0.0.0 0.0.0.0 S0/0/1RTB(config)# ip route 0.0.0.0 0.0.0.0 10.16.10.6

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

exchanges datagrams unreliablyis used to send IP error messagesforces the retransmission of unacknowledged packetscreates a virtual session between end-user applicationscarries the IP address of the destination host in the TCP headeris responsible for breaking messages into segments and reassembling them at their destination

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

DNS serverWINS serverHTTP serverdefault gateway

Netbios

24A network administrator is asked to design a system to allow simultaneous access to the Internetfor 250 users. The ISP can only supply five public IP addresses for this network. What technologycan the administrator use to accomplish this task?

classful subnettingvariable length subnet masksclassless interdomain routingport-based Network Address Translation

25A client at a workstation with IP address 192.168.1.201/24 connects to a web server with IP address192.168.1.254/24. Which two statements describe the transmission of a request for a web page asit 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.

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

RTB# ip address 192.168.102.98 255.255.255.248

RTB(config-if)# ip address 192.168.102.99 255.255.255.252RTB(config)# ip address 192.168.102.97 255.255.255.252RTB(config)# no shutdown


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RTB(config-if)# no shutdownRTB(config-if)# ip address 192.168.102.97 255.255.255.252

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

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

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

SNMPFTPDHCPSMTP

29How 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.

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

rolloverconsolecrossoverstraight-through

32

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

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.

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

345120

34Which two commands ensure that any password that permits access to the privileged EXEC mode isnot shown in plain text when the configuration files are displayed? (Choose two.)

Router(config)# enable secret ciscoRouter(config)# enable ciscoRouter(config)# encryption-password allRouter(config)# enable login encryptedRouter(config)# enable password encryptionRouter(config)# service password-encryption

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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 segmentto identify which switch ports should receive or forward the segmentto determine which Layer 3 protocol should be used to encapsulate the datato enable a receiving host to forward the data to the appropriate applicationto allow the receiving host to assemble the packet in the proper order

36Which two subnet masks could be used when subnetting a Class B IP address? (Choose two.)

255.255.255.240255.255.192.0255.255.0.0

255.192.0.0240.0.0.0255.0.0.0


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37Which 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 theshow ip route and show ip protocols commands.Because of router processor usage, the debug ip rip command should be used only whennecessary.

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

38Which mode does a router enter when no configuration file is located in NVRAM?

ROMMONsetupglobal configurationprivileged exec

39A customer reports connectivity problems to an ISP technician. Upon questioning the customer, thetechnician discovers that all network applications are functioning except for FTP. What should thetechnician suspect is the problem?

misconfigured firewallbad port on switch or hubmisconfigured IP addressing on the customer's workstationwrong DNS server configured on the customer's workstationwrong 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 thefollowing output was displayed:


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C 192.168.4.0/24 is directly connected, Serial0/0R 192.168.5.0/24 [120/1] via 192.168.4.2, 00:00:19, Serial0/0R 192.168.1.0/24 [120/2] via 192.168.3.1, 00:00:20, Serial0/1R 192.168.2.0/24 [120/2] via 192.168.3.1, 00:00:20, Serial0/1C 192.168.3.0/24 is directly connected, Serial0/1From which router was this command executed?

ABCD

41

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

STPUTPcoaxial

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.


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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.

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

branch_23(config-if)# ip address 192.168.5.19 255.255.255.240branch_23(config-if)# no shutdownbranch_23(config-if)# encapsulation hdlcbranch_23(config-if)# ip address 192.168.5.25 255.255.255.240branch_23(config-if)# no shutdownbranch_23(config-if)# encapsulation pppbranch_23(config-if)# no shutdownbranch_23(config-if)# encapsulation pppbranch_23(config-if)# ip address 192.168.5.33 255.255.255.240branch_23(config-if)# encapsulation pppbranch_23(config-if)# ip address 192.168.5.21 255.255.255.240branch_23(config-if)# no shutdown

45A 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 transitionsfrom 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.

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Refer to the exhibit. A user who is connected to RTA is trying to telnet to RTB, but the connection isfailing. 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.

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

RouterA(config)# ip route 192.168.4.0 255.255.255.0 192.168.5.2RouterA(config)# ip route 192.168.4.0 255.255.255.0 192.168.3.2

RouterA(config)# ip route 192.168.5.0 255.255.255.0 192.168.3.2RouterA(config)# ip route 192.168.3.0 255.255.255.0 192.168.3.1RouterA(config)# ip route 192.168.3.2 255.255.255.0 192.168.4.0

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Which type of address is 192.168.17.111/28?host addressnetwork address


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broadcast addressmulticast address

49

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

255.255.0.0255.255.224.0255.255.255.0255.255.255.224255.255.255.240255.255.255.248

50Which two protocols allow network devices to report their status and events to a centralizednetwork management device? (Choose two.)

SyslogTelnetHTTPHTTPSSNMP

51How 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.


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52

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

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.

53How many host addresses may be assigned on each subnetwork when using the 130.68.0.0network address with a subnet mask of 255.255.248.0?

302562046204840944096

54A user reports being unable to access the Internet. The help desk technician employs a bottom-upapproach to troubleshooting. The technician first has the user check the patch cable connectionfrom the PC to the wall, and then has the user verify that the NIC has a green link light. What willthe 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.


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55

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

Source: 10.1.1.2 Destination: 172.30.20.100Source: 10.1.1.2 Destination: 192.168.1.2Source: 172.30.20.1 Destination: 172.30.20.2Source: 172.30.20.10 Destination: 172.30.20.100Source: 172.30.20.10 Destination: 192.168.1.2

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

Convergence timeDefault distanceMetric

Type of router


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57

Refer to the exhibit. A network administrator is troubleshooting the serial connection between R1and R2. There is no communication between R1 and R2. Based on the output of the show ipinterface briefcommand, 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.

58Which two processes enable a router to determine paths to destination networks? (Choose two.)

inspection of the source IP address in data packetsARP requests from connected routersmanual configuration of routesupdates from other routersDHCP information broadcastsupdates from the SMTP management information base

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