OSPF, BGP

What is the default OSPF cost for a Fast Ethernet interface?

1

What is the Cisco administrative distance of OSPF?

110

eBGP routes have an administrative distance of ____, and iBGP routes have an administrative distance of ____.

20 200

Which multicast addresses do OSPFv2 routers use?

224.0.0.5 for ALLSPFRouters and 224.0.0.6 for ALLDRouters.

Which OSPFv2 router type generates the OSPF Type 3 LSA?

ABR

How many bits are mapped from the Layer 3 IPv4 multicast address to a Layer 2 MAC address? a. 16 bits b. 23 bits c. 24 bits d. 32 bits

B. The lower 23 bits of the IP multicast address are mapped to the last 23 bits of the Layer 2 MAC address.

Where should you use filters? a. Routers A and B b. Routers C and D c. Routers A and C d. Answers A and B

D. You should use filters on all routers performing redistribution.

Which OSPFv2 router type generates the OSPF Type 2 LSA?

DR

True or false: A router needs to have all its interfaces in Area 0 to be considered an OSPF backbone router.

FALSE

What IPv6 multicast address does EIGRP use for IPv6?

FF02::A.

True or false: Autonomous system path is the only attribute BGP uses to determine the best path to the destination

False

True or false: BGP Version 4 does not include support for CIDR, only OSPF and EIGRP do.

False

True or false: The router with the lowest priority is selected as the OSPF DR.

False

True or false: You use iBGP to exchange routes between different autonomous systems.

False. You use eBGP to exchange routes between different autonomous systems.

What is included in an OSPFv2 router LSA?

Hello Tmers

Which routing protocol do you use in the core of a large enterprise network that supports VLSMs for a network with a mix of Cisco and non-Cisco routers?

OSPF

List three IP routing protocols that use multicast addresses to communicate with their neighbors.

RIPv2, OSPF, and EIGRP.

True or false: eBGP and iBGP redistribute automatically on a router if the BGP peers are configured with the same autonomous system number.

TRUE

True or false: OSPF and IS-IS use a designated router in multiaccess networks.

True

What is the benefit of designing for stub areas?

You do not need to flood external LSAs into the stub area, which reduces LSA traffic.

What is the administrative distance of eBGP routes? a. 20 b. 100 c. 110 d. 200

a. 20

Which routing protocol does not support VLSMs? a. RIPv1 b. OSPFv2 c. EIGRP d. RIPv2 e. B and C f. B, C, and D

a. RIPv1

Which statements are correct? (Choose two.) a. The Dijkstra algorithm is used by both OSPF and IS-IS to calculate the shortest best path. b. IS-IS is a proprietary protocol. OSPF is a standards-based protocol. c. OSPF is only used on enterprise networks and IS-IS by service providers. d. ISIS boundaries are links; OSPF area boundaries are within the routers.

a. The Dijkstra algorithm is used by both OSPF and IS-IS to calculate the shortest best path. d. ISIS boundaries are links; OSPF area boundaries are within the routers.

To where are OSPF Type 1 LSAs flooded? a. The OSPF area b. The OSPF domain c. From the area to the OSPF backbone d. Through the virtual link

a. The OSPF area

3. What is an ASBR? a. Area Border Router b. Autonomous System Boundary Router c. Auxiliary System Border Router d. Area System Border Router

b. Autonomous System Boundary Router

What is IGMP? a. Interior Group Management Protocol b. Internet Group Management Protocol c. Interior Gateway Routing Protocol d. Interior Gateway Media Protocol

b. Internet Group Management Protocol

Which link-state routing protocols support IPv6 routing? a. RIP b. OSPF c. EIGRP d. BGP e. IS-IS

b. OSPF e. IS-IS

Where should routes be summarized? a. On the core routers b. On the distribution routers c. On the access routers d. None of the above

b. On the distribution routers

Which protocol defines an Area Border Router (ABR)? a. Enhanced Interior Gateway Routing Protocol (EIGRP) b. Open Shortest Path First (OSPF) c. Intermediate System-to-Intermediate System (IS-IS) d. Routing Information Protocol (RIP)

b. Open Shortest Path First (OSPF)

What protocol do you use to exchange IP routes between autonomous systems? a. IGMP b. eBGP c. EIGRP d. OSPF

b. eBGP

What address do you use to multicast to the OSPFv2 designated router (DR)? a. 224.0.0.1 b. 224.0.0.5 c. 224.0.0.6 d. 224.0.0.10

c. 224.0.0.6

Which of the following statements is correct? a. OSPFv3 provides changes to OSPFv2 for use in IPv4 networks. b. OSPFv3 provides changes to OSPFv2 for use in IPv6 networks. c. OSPFv3 provides changes to OSPFv2 for use in IPv6 and IPv4 networks. d. OSPFng provides changes to OSPFv2 for use in IPv6 networks.

c. OSPFv3 provides changes to OSPFv2 for use in IPv6 and IPv4 networks.

Which protocol is commonly used to connect to an ISP? a. RIPv2 b. OSPF c. EIGRP d. BGP

d. BGP

What OSPFv3 LSA carries address prefixes? a. Network LSA b. Summary LSA c. Inter-area-router LSA d. Intra-area-prefix LSA

d. Intra-area-prefix LSA

Which routing protocols have fast convergence for IPv4 networks? a. BGP b. OSPFv2 c. EIGRP d. RIPv2 e. B and C f. B, C, and D g. A, B, and C

e. B and C

What is the OSPFv2 link-state advertisement (LSA) type for autonomous system external LSAs? a. Type 1 b. Type 2 c. Type 3 d. Type 4 e. Type 5

e. Type 5

Which routing protocols are recommended for large enterprise networks? a. RIPv2 b. OSPFv2 c. EIGRP d. IS-IS e. A and B f. B and C g. B and D h. A, B, C, and D

f. B and C

Which routing protocols have fast convergence for IPv6 networks? a. RIPng b. OSPFv3 c. EIGRP for IPv6 d. RIPv2 e. MP-BGP f. B and C g. B, C, and D h. B, C, and E

f. B and C

Which routing protocols support variable-length subnet masks (VLSMs)? a. EIGRP b. OSPF c. IS-IS d. A and B e. A and C f. B and C g. A, B, and C

g. A, B, and C

A retail chain has about 800 stores that connect to the headquarters and a backup location. The company wants to limit the amount of routing traffic used on the WAN links. What routing protocol(s) is/are recommended? a. RIPv1 b. RIPv2 c. OSPFv2 d. EIGRP e. IS-IS f. BGP g. B, C, and D h. C and D i. C, D, and E

h. C and D

Match the routing protocol with the description: i. EIGRP ii. OSPFv2 iii. RIPv2 iv. BGP a. Distance-vector protocol used in the edge of the network b. IETF link-state protocol used in the network core c. Hybrid protocol used in the network core d. Path-vector protocol

i - c ii - b iii - a iv - d