Cisco CCNA mock exam questions sample test – Question 421

.How many collision and broadcast domains are in the network shown below?

A. 4 collision domains and 3 broadcast domains
B. 7 collision domains and 2 broadcast domains
C. 8 collision domains and 1 broadcast domain
D. 6 collision domains and 2 broadcast domains


Correct Answer: B

Explanation:
There are 7 collision domains and 2 broadcast domains. They are labeled as shown below. Each router interface makes a broadcast domain and each switch interface creates a
collision domain. The hub interfaces do neither.
Objective:
Routing Fundamentals
Sub-Objective:
Describe the routing concepts
References:
Internetwork Design Guide — Designing Switched LAN Internetworks > Comparison of LAN Switches and Routers