QUESTION 21 Where in a network does IS-IS use level-1 routing?

A. Between areas.

B. Between domains.

C. Between intermediate systems in the same area.

D. Between end systems and intermediate systems in the same area. Answer: C Explanation: A two-level hierarchy is used to support large routing domains. A large domain may be administratively divided into areas. Each system resides in exactly one area.1 Routing within an area is referred to as Level 1 routing. Routing between areas is referred to as Level 2 routing. A Level 2 Intermediate System (IS) keeps track of the paths to destination areas. A Level 1 IS keeps track of the routing within its own area. For a packet destined for another area, a Level 1 IS sends the packet to the nearest Level 2 IS in its own area, regardless of what the destination area is. Then the packet travels via Level 2 routing to the destination area, where it may travel via Level 1 routing to the destination. It should be noted that selecting an exit from an area based on Level 1 routing to the closest Level 2 IS might result in suboptimal routing.2 Reference: http://www.cisco.com/en/US/tech/tk365/tk381/technologies_white_paper09186a00800a3e6f.shtml

QUESTION 22 The following is an OSI IS-IS NSAP address: 47.040C.0061.040C.0056.0D12.00 What is the Area ID in this specific address?

A. 46

B. 00

C. 47.040C

D. 47.040C.0061

E. 040C.0056.0D12 Answer: D Explanation: An NSAP address (figure 7) has two major parts: the initial domain part (IDP) and the domain specific part (DSP) (Figure 7). The IDP consists of a 1-byte authority and format identifier (AFI) and a variable-length initial domain identifier (IDI), and the DSP is a string of digits identifying a particular transport implementation of a

specified AFI authority. Everything to the left of the system ID can be thought of as the area address of a network node. Figure 7 The NSAP address

Reference: http://www.cisco.com/en/US/tech/tk365/tk381/technologies_white_paper09186a00800a3e6f.shtml

QUESTION 23 You are the network administrator at Cisco Highway. You issue the following configuration commands on a router named Cisco Highway2. Cisco Highway2(config)#router rip Cisco Highway2(config-router)#version 2 Cisco Highway2(config-router)#no auto-summary What would be the effect of these configuration commands?

A. Subnet mask information is not passed in the routing updates.

B. Subnets are advertised across network boundaries.

C. Subnets are summarized at the network boundary.

D. Subnets are made discontiguous. Answer: B Explanation: To restore the default behavior of automatic summarization of subnet routes into network-level routes, use the information across classful network boundaries, use the no form of this command. Reference: http://www.cisco.com/en/US/products/sw/iosswrel/ps1826/products_command_summary_chapter09186a00800 d9c56.html

QUESTION 24 What is the function of the network command when you configure BGP?

A. Routes matching the network command will be filtered from BGP routing updates.

B. Local routes matching the network command can be installed into the BGP routing table.

C. Local routes matching the network command are filtered from the BGP routing table.

D. External routes matching the network command will be installed into the BGP routing table. Answer: B Explanation: Use the network router configuration command to permit BGP to advertise a network if it is present in the IP routing table. Reference: Building Scalable Cisco Networks (Cisco press) page 342

QUESTION 25 Cisco Highway.com is changing Internet service providers. As a result, they will need to install a local E-mail server. Cisco Highway does not want to change the IP Addresses on all of its internal routers and servers. The ISP, Acme Inc. will allocate a registered class C address for Cisco Highway to use. The current internal IP Address scheme will remain the same. Configure the router to provide network address translation (NAT) so that all internal PCs will use the single external IP Address assigned to the router interface. Configure a static translation so that the E-mail server will be accessible from the Internet. Due to Cisco Highway.com changing Internet Service Providers, they must install a local E-mail server. Privileged mode password: Cisco Highway IP Addresses are shown below: Name: Cisco HighwayNAT SO 192.168.15.1/24 E0 10.100.5.1/24 E-mail Server's External Address 192.168.15.5/24 E-mail Server's Internal Address 10.100.5.5/24 To configure the router click on a host icon that is connected to a router by a serial console cable.

Answer: Cisco HighwayNAT#Conf t Cisco HighwayNAT(config)#Access-list 5 permit 10.100.5.0 0.0.0.255 Cisco HighwayNAT(config)#Ip nat pool lan 192.168.15.1 192.168.15.1 netmask 255.255.255.0 Cisco HighwayNAT(config)#Ip nat inside source list 5 pool lan overload Cisco HighwayNAT(config)#Ip nat inside source static 10.100.5.5 192.168.15.5 Cisco HighwayNAT(config-if)#Int S0 Cisco HighwayNAT(config-if)#Ip nat outside Cisco HighwayNAT(config-if)#Int E0 Cisco HighwayNAT(config-if)#Ip nat inside Cisco HighwayNAT(config-if)#exit Cisco HighwayNAT(config)#exit Cisco HighwayNAT#copy run start

QUESTION 26 What is the method called that hides the internal IP address details and particulars from the outside world?

A. Challenge Handshake Protocol

B. Supernetting

C. Subnetting

D. Usernames and passwords Answer: B Explanation: In large internet works, hundreds or even thousands of networks can exist. In these environments, it is often not Desirable for routers to maintain all these routes in their routing table Route summarization (also called route aggregation or supernetting) can reduce the number of routes that a router must maintain because is it a method of representing a series of network numbers in a single summary address. Reference: Building Scalable Cisco Networks (Cisco press) page 250

QUESTION 27 What type of information can be found in an OSPF type 3 network summary link LSA?

A. Summary of link state in an OSPF area.

B. Summary of metric coast from ABR to ASBR.

C. Summary of IP subnets in an OSPF area.

D. Summary of routes in the AS. Answer: C Explanation: Inter-area-prefix LSAs for ABRs (Type 3)-Advertises internal networks to routers in other areas (interarea routes). Type 3 LSAs may represent a single network or a set of networks summarized into one advertisement. Only ABRs generate summary LSAs. In OSPF for IPv6, addresses for these LSAs are expressed as prefix, prefix length instead of address, mask. The default route is expressed as a prefix with length 0. Reference: http://www.cisco.com/en/US/products/sw/iosswrel/ps1839/products_feature_guide_chapter09186a0080145c56. html

QUESTION 28 You are the network administrator at Cisco Highway. The Cisco Highway network has different routing policy requirements than what its Internet Service Provider provides. Which routing protocol will you recommend for the Cisco Highway network?

A. IS-IS

B. EIGRP

C. OSPF

D. BGP4

E. RIPv2 Answer: D Explanation: There are specific situations where using BGP is important, including the following: The routing policy of the ISP and your company differ. The cost of the link depends on usage in addition to other factors that might need to be programmed into the BGP configuration to make the best use of the connection by manipulating the traffic.

Reference: Source: CCNP Self-Study CCNP BSCI Exam Certification Guide Third Edition P.517, Topic: When to Use BGP

QUESTION 29 You are the network administrator at Cisco Highway. The router topology for the Cisco Highway network is shown in the following exhibit:

You want to configure Cisco Highway1 and Cisco Highway2 to correctly exchange routing information via BGP. Which command sets will you use? (Choose all that apply.)

A. Cisco Highway2(config)#router bgp 200 Cisco Highway2(config-router)#neighbor 10.1.1.1 remote-as 100

B. Cisco Highway1(config)#router bgp 100 Cisco Highway1(config-router)#exit Cisco Highway1(config)#interface S0 Cisco Highway1(config-if)#neighbor 10.1.1.2 remote-as 200

C. Cisco Highway1(config)#router bgp 100 Cisco Highway1(config-router)#neighbor 10.1.1.2 remote-as 200

D. Cisco Highway2(config)#router bgp 100 Cisco Highway2(config-router)exit Cisco Highway2(config)#interface S0 Cisco Highway2(config-if)#neighbor remote-as 100

E. Cisco Highway1(config)#router bgp 100 Cisco Highway1(config-router)#network 10.0.0.0 Cisco Highway1(config-router)#neighbor 10.1.1.2 remote-as 100

F. Cisco Highway2(config)#router bgp 200 Cisco Highway2(config-router)#network 10.0.0.0 Cisco Highway2(config-router)#network 10.1.1.1 remote-as 200 Answer: A, C

QUESTION 30 Of the following, which EIGRP table is comparable to a Link State Adjacency table?

A. Neighbor table

B. Topology table

C. Routing table

D. Successor table Answer: A Explanation: Neighbor table - Each EIGRP router maintains a neighbor table that lists adjacent routers. This table is comparable to the neighbor ship (adjacency) database used by OSPF.

Reference: Building Scalable Cisco Networks (Cisco press) page 250