CISCO Q&A

QUESTION NO: 1
A packet that needs to be forwarded arrives on an interface of a router. In order for a router to route data, what must that router determine? (Select the best answer)
A. The route age of the next-hop device
B. The subnet mask of the source network
C. The cost metric of the path of the destination
D. The outbound interface of the best path to the destination
E. All of the above

Answer: D
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QUESTION NO: 2
A new router is being installed into an existing network, and the routing table is being built for the first time on this network. Which of the following statements is true regarding the routing tables on a Cisco router?
A. Entries are listed in the order of the route cost metric.
B. Only the active link is shown for load-balanced routers.
C. Privileged EXEC mode is required to view the routing table.
D. The clear ip route * command refreshes the entire routing table.
E. All of the above are true.

Answer: C
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QUESTION NO: 3
Which of the following phrases is the correct term for what happens to a network when a topology change causes all the routers to synchronize their routing tables?
A. Flooding
B. Broadcasting
C. Convergence
D. Summarization
E. None of the above

Answer: C
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QUESTION NO: 4
What is the purpose of configuring a router with the “IP Helper address” command?
A. IP Helper is used to direct BOOTP clients to a BOOTP server.
B. IP Helper is used to prevent the router form forwarding IP broadcasts.
C. IP Helper is used to allow IPX clients to communicate with IP-based servers.
D. IP Helper is used to accommodate compatibility routers using different IP routingprotocols.

Answer: A
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QUESTION NO: 5
On router TK1 the command “ip helper address” is already configured. Which of the following commands would you use if you wanted to send SNMP broadcast packets off to a specific server?
A. ip server udp 161
B. ip helper-protocol 161
C. ip forward-protocol 161
D. ip directed-broadcast 161
E. ip forward snmp

Answer: C
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QUESTION NO: 6
When you execute the “ip helper-address” command on a router, which three UDP ports get enabled automatically by default? (Select three)
A. 53 (DNS)
B. 69 (TFTP)
C. 515 (LPR)
D. 161 (SNMP)
E. 49 (TACACS)

Answer: A, B, E
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QUESTION NO: 7
Which administrative distance is given to EIGRP summary routes?
A. 0
B. 1
C. 5
D. 90
E. 95
F. 150

Answer: C
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QUESTION NO: 8
You are determining the routing protocol to use throughout your network. In doing thisvyou compare the advantages of classless and classful protocols. Which of the following statements are true regarding classless routing protocols?
A. A default gateway is required.
B. Variable-length subnet masks are not supported.
C. Routers are automatically summarized to class boundaries.
D. Networks with different subnet masks can exist in the same address class.
E. All of the above

Answer: D
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QUESTION NO: 9
Which two of the following describe advantages of implementing a classless routing protocol, when compared to a classful routing protocol?
A. Support for VLSM.
B. Support for FLSM.
C. Summarization of discontinuous subnets.
D. Auto-summarization across network boundaries.
E. The ip classless command improves convergence time.

Answer: A, C
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QUESTION NO: 10
You wish to use a classless IP routing protocol within your network. Which of the following classless routing protocols could you use? (Select all that apply)
A. IS-IS
B. IGRP
C. RIPv1
D. OSPF
E. EIGRP

Answer: A. D, E
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QUESTION NO: 11
When comparing and contrasting the differences between classless and classful routing protocols, which of the following is true?
A. In a classful system, a router uses a bit mask to determine the network and host portions of an address and there is no class restriction.
B. In a classless system, a router determines the class of an address and then identifies thenetwork and host octets based on that class.
C. In a classful system, subnet mask information is maintained and passed along with eachrouting update.
D. In a classless system, when a routing update is received about a different major networkas configured on the receiving interface, the default subnet mask is applied.
E. In a classful system, when a routing update is received about the same major network asconfigured on the receiving interface, the router applies the subnet mask configured onthe receiving interface.

Answer: E
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QUESTION NO: 12
The Bellman-Ford algorithm is used by the grand majority of distance vector routing protocols in calculating routes. One sophisticated routing protocol doesn’t use this algorithm; instead it uses the DUAL (diffusing update algorithm). Which of the following routing protocols is it?
A. IGRP
B. OSPF
C. EIGRP
D. RIP v.2
E. RIP v.1

Answer: C
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QUESTION NO: 13
With regards to RIP version 1 networks, which of the following two statements are true?(Choose two)
A. RIP v.1 route updates have a subnet mask field.
B. RIP v.1 networks are known as classful networks.
C. RIP v.1 networks are known as classless networks.
D. RIP v.1 route updates do not have a subnet mask field.

Answer: B, D
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QUESTION NO: 14
In an effort to increase network security, RIP routing authentication is being configured on a network. Which of the following types of authentication does RIPv2 support?
A. MD5 only
B. PAP and CHAP
C. clear text and PAP
D. clear text and MD5
E. MD5 and CHAP

Answer: D
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QUESTION NO: 15
OSPF and IS-IS are examples of link state protocols. Which two features are characteristics of link-state routing protocols? (Choose two)
A. Link-state protocols are based on the Dijkstra algorithm.B. Any incremental updates contain the full routing table.C. Link-state protocols flood the area with LSAs when a network change occurs.D. Routing updates are broadcast to neighbors.E. Link-state protocols use split-horizon updates to avoid routing loops.

Answer: A, C
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QUESTION NO: 16
When an administrator uses VLSM to subnet a network address, which of the followingrules must be adhered to? (Select three)
A. A subnet is made up of all aggregated routes.
B. A subnet can address hosts, or be further subnetted.
C. A routing protocol must carry the subnet mask in updates.
D. Summarized networks must have the same high-order bits.

Answer: B,C,D
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QUESTION NO: 17
The Testking network is migrating to a classless routing protocol to support VLSM. Which two of the statements below correctly describe features of Variable Length Subnet Masking (VLSM)? (Select two)
A. It supports IP version 4 and 6.
B. It accommodates overlapping address ranges.
C. It allows for better route summarization within routing tables.
D. It allows subnetworks to be further divided into smaller subnets.

Answer: C, D
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QUESTION NO: 18
The CTO of TestKing INC. has called a meeting with all the system administrators to update them on the latest expansion plan of establishing multiple remote offices, andconnecting those remote offices to the central office by a WAN. Management is insistingthat an addressing scheme using VLSM be used, and they need six useable host addressesat each remote location. Assuming that TestKing is using a class C IP range, which variablelength subnet mask should be used to support the 6 hosts at each location?
A. /24
B. /28
C. /29
D. /30
E. /31
F. /32

Answer: C
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QUESTION NO: 19
You’re boss has assigned you the difficult task of subnetting a Class B network, so you choose 172.29.100.0/28. Which of the following answer choices reflect a valid VLSM subnetthat can be obtained from your Class B network?
A. 172.29.100.8
B. 172.29.100.32
C. 172.29.100.60
D. 172.29.100.104
E. 172.29.100.126

Answer: B
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QUESTION NO: 20
TestKing is using the private IP address range of 192.168.100.0/24 for use on all of the WAN links. If this network is divided using a /30 mask, how many total WAN subnets can be supported?
A. 14
B. 30
C. 62
D. 126
E. 254

Answer: C
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QUESTION NO: 21
You’ve secured the subnet and mask of 186.37.100.0/26 to use for some of your companiesremote offices. Which VLSM mask below could provide you with six useable host addresses in each branch subnet?
A. /24
B. /28
C. /29
D. /30
E. /31
F. None of the above

Answer: C