CertificationZone

Date of Issue: 03-01-2023

Question 1.
The Token Ring MAC address C000-0000-0002 represents which functional device?

a) The Ring Error Monitor
b) The Active Monitor
c) The Ring Parameter Server
d) The Configuration Report Server

Answer

Question 2.
The Physical Control Field in the Frame Control Byte of a frame has the value binary 0010. What type of frame is this?

a) A Claim Token Frame
b) A Beacon Frame
c) An Active Monitor Present Frame
d) A Ring Purge Frame

Answer

Question 3.
What is the maximum frame length on a 4 Mbps Token Ring?

a) 4450
b) 2052
c) 1500
d) 516

Answer

Answers

Answer
c) The Ring Parameter Server

Explanation
The Ring Parameter Server uses the functional address C000-0000-0002. The Ring Error Monitor uses C000-0000-0008, the Active Monitor C000-0000-0001, and the Configuration Report Server C000-0000-0010.
[2938]

CCIE Topic(s): I
CCIE Objective(s): I2
CCNA Topic(s):
CCNA Objective(s):

Answer
b) A Beacon Frame

Explanation
A physical Control Field (PCF) value of 0010 indicates the frame is a MAC Beacon frame. A Claim Token has a PCF of 0011, an Active Monitor Present is 0101, and a Ring Purge 0100.
[2939]

CCIE Topic(s): I
CCIE Objective(s): I2
CCNA Topic(s):
CCNA Objective(s):

Question 3.
What is the maximum frame length on a 4 Mbps Token Ring?

a) 4450
b) 2052
c) 1500
d) 516

Answer
a) 4450

Explanation
Use the Token Holding Timer to calculate the maximum frame length. Multiply this value (8.9 milliseconds) by the ring speed (4,000,000 for a 4 Mbps ring) and then divide by 8.

4,000,000 bps x .0089 s / (8 bytes/bit) = 4,450 bytes.

The other values (516, 2052 and 1500 bytes) are all valid frame sizes for a 4 Mbps ring, but not the maximum.
[2940]

CCIE Topic(s): I
CCIE Objective(s): I2
CCNA Topic(s):
CCNA Objective(s):

[IE-TKRN-SQ1-F02]
[2000-07-05-01]