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Review Questions

1.  IS-IS defines areas:
A.  As Layer 1, which is intra-area, and Layer 2, which links two areas
B.  As a single AS linked by multiple ABSRs
C.  As multiple Layer 1 inter-area links
D.  As Layer 2 intra-areas and Layer 1 transit areas.
2.  Under IGRP, split horizon would be off, by default, for which of the following?
A.  Token Ring
B.  Ethernet
C.  SMDS
D.  FastEthernet
E.  None of the above
3.  IGRP will do which of the following?
A.  Send hellos every 10 seconds.
B.  Send hellos every two hours.
C.  Send the entire routing table every 90 seconds.
D.  Send only changes to the routing table every 90 seconds.
4.  In IGRP, the default update timer is:
A.  30 seconds
B.  60 seconds
C.  90 seconds
D.  120 seconds
5.  In IGRP, the default holddown timer is:
A.  30 seconds
B.  90 seconds
C.  270 seconds
D.  280 seconds
E.  300 seconds
6.  By default, IGRP will use only which of the following to determine a route’s metric?
A.  Bandwidth
B.  Delay
C.  Reliability
D.  Loading
E.  MTU
F.  Hops
7.  Which of the following would be a benefit in using static routes?
A.  Low bandwidth utilization
B.  10-second updates
C.  Automatic configuration
D.  Load balancing
8.  Which of the following routing protocols support VLSM?
A.  RIP
B.  RIP v2
C.  OSPF
D.  IGRP
E.  EIGRP
9.  Which of the following is a benefit of VLSM?
A.  Faster convergence with RIP
B.  Faster convergence with OSPF
C.  Faster convergence with IGRP
D.  Efficient IP address assignment
10.  Which of the following protocols uses a persistent TCP connection to communicate with neighbor routers?
A.  OSPF
B.  BGP
C.  RIP
D.  EIGRP
11.  A virtual link is which of the following?
A.  A conduit through area zero
B.  A conduit through two EIGRP autonomous systems
C.  A connection between an EIGRP AS and an OSPF area
D.  A connection between a remote area and area zero via another area
12.  True or false: IGRP uses triggered updates.
A.  True
B.  False
13.  EIGRP can maintain how many routes per destination?
A.  1
B.  2
C.  4
D.  6
14.  A discontiguous subnet is:
A.  Two or more subnets from a major network divided by a different major network
B.  A single summary route from a major network
C.  Not permitted in OSPF
D.  Permitted in OSPF, but not part of the link-state database
15.  OSPF can load-balance, by default, how many routes?
A.  2
B.  4
C.  6
D.  OSPF cannot load-balance.
16.  The algorithm used by OSPF is called which of the following?
A.  DUAL
B.  SPF (Sequenced Packet Format)
C.  Dijkstra’s
D.  Radia
17.  The OSPF link-state summary table is sent under which of the following circumstances?
A.  Every 30 minutes
B.  Every 90 seconds
C.  Every 30 seconds
D.  Every time there is a change in topology
18.  EIGRP will support discontiguous subnets; however, the administrator must:
A.  Disable auto-summary
B.  Use different AS numbers
C.  Manually summarize routes
D.  Use static routes, as EIGRP cannot support this function manually
19.  Which of the following would not be considered an advantage of OSPF?
A.  An open standard supported by many vendors
B.  Quick convergence
C.  Support for discontiguous subnets
D.  Use of unicast frames for information exchange
E.  Support for VLSM
20.  Which of the following would likely not be configured by a corporate WAN designer?
A.  Stub AS
B.  Transit AS
C.  Multi-homed AS
D.  All of the above
21.  IS-IS is:
A.  A classless, distance-vector protocol suited to small networks
B.  A classful, link-state protocol that scales to support large networks
C.  An exterior routing protocol used in the Internet
D.  A classless, link-state protocol that supports large networks
E.  An interior routing protocol used to support small networks using ATM
22.  Which of the following are link-state protocols?
A.  RIP v2
B.  OSPF
C.  IS-IS
D.  EIGRP
E.  IGRP
23.  Which best describes BGP?
A.  Distance vector
B.  Distance path
C.  Link state
D.  Path vector
E.  Exterior link-state vectoring
24.  While BGP was intended for Internet connectivity, many large networks are advised to consider it:
A.  As an exclusive IGP routing protocol
B.  As an interconnecting routing protocol between different IGPs
C.  Only in concert with IS-IS
D.  Only for extranet connections
25.  The BGP multi-exit discriminator:
A.  May be a fixed value
B.  May be based on an IGP metric
C.  May be either A or B
D.  Works only with OSPF

Answers to Review Questions

1.  A.
2.  E.
3.  C.
4.  C.
5.  D.
6.  A, B.
7.  A.
8.  B, C, E.
9.  D.
10.  B.
11.  D.
12.  A.
13.  D.
14.  A.
15.  B.
16.  C.
17.  A, D.
18.  A.
19.  D.
20.  B.
21.  D.
22.  B, C.
23.  D.
24.  B.
25.  C.


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