CertificationZone

Date of Issue: 05-01-2023

Question 1.
Which are valid LMI types in Cisco routers?

a) IETF, Cisco, ANSI
b) IETF, CCITT, Cisco
c) Cisco, q933a, ANSI
d) Cisco, ANSI, IETF
e) B8ZS, CCITT, IETF, Cisco

Answer

Question 2.
In the following configuration, to what does 4800 refer?

interface Serial0
no ip address
encapsulation frame-relay
frame-relay lmi-type ansi
frame-relay traffic-shaping
frame-relay class slow_vcs
!
map-class frame-relay slow_vcs
frame-relay traffic-rate 4800 9600

a) 4800 bps is the committed burst rate.
b) 4800 bps is the peak traffic rate.
c) 4800 Kbps is the excess burst rate.
d) 4800 is the Committed Information Rate or CIR.

Answer

Question 3.
What does the number 64 in the following frame-relay command indicate?

frame-relay broadcast-queue 64 256000 36

a) The maximum number of packets to be transmitted per second
b) The maximum number of kilobytes to be transmitted per second
c) The maximum number of packets to hold in the broadcast queue
d) A committed burst rate of 64K

Answer

Answers

Question 1.
Which are valid LMI types in Cisco routers?

a) IETF, Cisco, ANSI
b) IETF, CCITT, Cisco
c) Cisco, q933a, ANSI
d) Cisco, ANSI, IETF
e) B8ZS, CCITT, IETF, Cisco

Answer
c) Cisco, q933a, ANSI

Explanation
There are three valid LMI types: Cisco, q933a, and ANSI.

IETF is a frame-relay encapsulation type and B8ZS is a line coding.
[3072]

CCIE Topic(s): H
CCIE Objective(s): H2
CCNA Topic(s):
CCNA Objective(s):

Question 2.
In the following configuration, to what does 4800 refer?

interface Serial0
no ip address
encapsulation frame-relay
frame-relay lmi-type ansi
frame-relay traffic-shaping
frame-relay class slow_vcs
!
map-class frame-relay slow_vcs
frame-relay traffic-rate 4800 9600

a) 4800 bps is the committed burst rate.
b) 4800 bps is the peak traffic rate.
c) 4800 Kbps is the excess burst rate.
d) 4800 is the Committed Information Rate or CIR.

Answer
d) 4800 is the Committed Information Rate or CIR.

Explanation
4800 is the CIR or average rate in bits per second. The peak traffic rate in the given configuration is 9600 bps (bits per second). The excess burst rate and committed burst rate are used in the calculation for the peak rate: CIR + Be/Tc = CIR (1 + Be/Bc) = CIR + EIR.

Where

Be = Excess burst
Bc = Committed burst
Tc = measurement time
EIR = Excess Information Rate

[3073]

CCIE Topic(s): H
CCIE Objective(s): H2
CCNA Topic(s):
CCNA Objective(s):

Question 3.
What does the number 64 in the following frame-relay command indicate?

frame-relay broadcast-queue 64 256000 36

Answer
c) The maximum number of packets to hold in the broadcast queue

Explanation
The first number, 64, is the default maximum number of packets to hold in the broadcast queue. The second number, 256000, is the maximum number of bytes to be transmitted per second, and the third number, 36, is the maximum number of packets to be transmitted per second. Committed burst rate is not specified with the frame-relay broadcast-queue command.
[3074]

CCIE Topic(s): H
CCIE Objective(s): H2
CCNA Topic(s):
CCNA Objective(s):

[IE-FRAME-SQ1-F06]
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