Here are the answers to the bonus questions I posted Wednesday.

CCNA:

What protocol uses the term cost to describe its metric?


A. OSPF

B. IGRP

C. EIGRP

D. RIPv1

E. RIPv2

Answer: B. OSPF refers to its metric as "cost".


CCNP / BSCI:

Which of the following phrases applies to the distribution layer of Cisco's three-layer networking model?

A. traffic filtering generally occurs here

B. end users interact with the network here

C. Internet access is granted here

D. traffic filtering should be avoided at this layer

Answer: A, C. Traffic filtering and internet access generally occur at the distribution layer of Cisco's three-layer model. Traffic filtering should be avoided at the core layer to spare core devices any unnecessary latency.


CCNP / BCMSN:

At what layer of the Cisco hierarchical networking model should traffic be classified and marked when appropriate?

A. Access

B. Distribution

C. Classification

D. Core

E. Policing

Answer: A. The classification and marking of traffic for QoS purposes should take place at the access layer - the layer closest to the end users.


Wednesday Morning's CCNA / CCNP Practice

CCNA:

What are the frame relay LMI types? Choose all that apply.

A. cisco

B. ansi

C. dlci

D. isl

E. q933a

F. dot1q

G. hdlc

H. ppp

Answer: A, B, E. Cisco is the default.


CCNP / BSCI:

There are 10 routers in a BGP AS. The number of separate BGP peer connections that would be needed for a full mesh is:

A. 90

B. 60

C. 100

D. 99

E. 45

F. 98

Answer: E. To calculate the number of separate TCP connections you'll need for a logical full mesh in a BGP AS, use this formula:

X (X - 1) / 2
"X" being the number of routers. With 10 routers, the result is 90 / 2, or 45.



CCNP / BCMSN:

A packet enters a multilayer switch with a CoS of 2. Which of the following is true?

A. By default, the CoS value will be trusted.

B. By default, the CoS value will not be trusted.

C. If trusted, the CoS value will map to an internal DSCP value of 2.

D. If trusted, the CoS value will map to an internal DSCP value of 16.

E. If trusted, the CoS value will map to an internal DSCP value of 4.

Answer: B. The default behavior of the switch is to not trust incoming CoS values.

Chris Bryant
CCIE #12933
www.thebryantadvantage.com

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