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5/13/2018 CCNA 2 Discovery Final V4.1 - slidepdf.com
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Take Assessment - DsmbISP Final Exam - CCNA Discovery: Working at a Small-to-Medium Businessor 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
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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 backPC3. 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.
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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 thiscommand? (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
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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, thesource 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
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A new router is connected to an existing network. Which two tasks must be completed on the new router to include it in the dynamicrouting 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.
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When customers use credit cards to make purchases at a small business, a modem is heard dialing a telephone number to transfertransaction data to the central office. What type of WAN serial connection is in use?
leased line
packet switched
circuit switched
point-to-point
7
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A hacker attempts to reach confidential information that is stored on a server inside the corporate network. A network security solutioinspects the entire packet, determines that it is a threat, and blocks the packet from entering the inside network. Which security meaprotected the network?
an IDS
an IPS
a host-based firewall
Anti-X software
8
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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 interfa
Router(config)# interface serial 0/0/0Router(config-if)# ip address 192.168.1.10 255.255.255.252Router(config-if)# clock rate 64000Router(config-if)# no shutdown
Router(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 shutdown
Router(config)# interface serial 0/1/0Router(config-if)# ip address 192.168.1.10 255.255.255.252Router(config-if)# no shutdown
Router(config)# interface serial 1/2/1Router(config-if)# ip address 192.168.1.10 255.255.255.252Router(config-if)# no shutdown
9
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A company is developing an Internet store for its website. Which protocol should be used to transfer credit card information fromcustomers to the company web server?
FTPS
HTTP
HTTPS
WEP2
TFTP
10
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Refer to the exhibit. The diagram that is shown represents the network of a manufacturing company with its headquarters at one ena city and its warehouse at the other end. These two locations are connected via a T1 line. How will the Fohi router dynamically learroutes 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
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Refer to the exhibit. The network administrator has configured the RTA and RTB interfaces. In order to allow hosts that are attachedRTA 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 RTAneed 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
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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
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A user is attempting to do an http://www.cisco.com/ without success. Which two configuration values must be set on the host to allowthis access? (Choose two.)
DNS server
WINS server
HTTP server
default gateway
Netbios
24
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A network administrator is asked to design a system to allow simultaneous access to the Internet for 250 users. The ISP can only sufive 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
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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 twostatements describe the transmission of a request for a web page as it is sent from the web browser to the web server? (Choose tw
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 so that hosts from RTA can connect toserver 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
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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
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28 A network technician is using a network management station to gather data about the performance of devices and links within the ISWhich application layer protocol makes this possible?
SNMP
FTP
DHCP
SMTP
29
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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
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Refer to the exhibit. Which type of UTP cable should be used to connect Host A to Switch1?
rollover
console
crossover
straight-through
32
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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 twevents 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.
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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.network?
3
4
5
120
34
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Which two commands ensure that any password that permits access to the privileged EXEC mode is not shown in plain text when thconfiguration 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
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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 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
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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
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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 protococommands.
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
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Which mode does a router enter when no configuration file is located in NVRAM?
ROMMON
setup
global configuration
privileged exec
39
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A customer reports connectivity problems to an ISP technician. Upon questioning the customer, the technician discovers that all netwapplications 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
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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, Serial0/0R 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, Serial0/1
From which router was this command executed?
A
B
C
D
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41
Refer to the exhibit. The network administrator of the building in the graphic needs to choose the type of cable best suited to addServerB to the network. Which cable type is the best choice?
STP
UTP
coaxial
fiber optic
42
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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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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 router is to be installed to allow branchoffice users to access the database server at headquarters. How should the serial 0/0/0 interface of the new branch office router beconfigured to connect to the headquarters router?
branch_23(config-if)# ip address 192.168.5.19 255.255.255.240branch_23(config-if)# no shutdown
branch_23(config-if)# encapsulation hdlcbranch_23(config-if)# ip address 192.168.5.25 255.255.255.240branch_23(config-if)# no shutdown
branch_23(config-if)# encapsulation pppbranch_23(config-if)# no shutdown
branch_23(config-if)# encapsulation pppbranch_23(config-if)# ip address 192.168.5.33 255.255.255.240
branch_23(config-if)# encapsulation pppbranch_23(config-if)# ip address 192.168.5.21 255.255.255.240branch_23(config-if)# no shutdown
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45 A Catalyst switch is used as a temporary replacement for another switch that needs to be repaired. About a minute after the switch hstarted, the SYST LED on the front of the switch transitions from blinking green to amber. What is the meaning of the amber SYST L
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
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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 thshow 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
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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
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Which type of address is 192.168.17.111/28?
host address
network address
broadcast address
multicast address
49
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Refer to the exhibit. Which subnet mask would accommodate the number of hosts indicated for all subnets if the major network addrwas 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
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50 Which two protocols allow network devices to report their status and events to a centralized network management device? (Choosetwo.)
Telnet
HTTP
HTTPS
SNMP
51
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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
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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
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How many host addresses may be assigned on each subnetwork when using the 130.68.0.0 network address with a subnet mask o255.255.248.0?
30
256
2046
2048
4094
4096
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A user reports being unable to access the Internet. The help desk technician employs a bottom-up approach to troubleshooting. Thetechnician first has the user check the patch cable connection from the PC to the wall, and then has the user verify that the NIC hasgreen 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.
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Refer to the exhibit. Both R1 and R2 are performing static NAT translations for their inside networks. A packet is sent from HostA to tweb 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
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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
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Refer to the exhibit. A network administrator is troubleshooting the serial connection between R1 and R2. There is no communicatiobetween 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.
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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