COMPUTER NETWORKING

DATA LINK LAYER WIRED NETWORKS

INTRODUCTION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the layer 2 broadcast address?
A
FF:FF:FF:FF:FF:FF
B
255.255.255.255
C
255.255.0.0
D
AA:AA:AA:AA:AA:AA
Explanation: 

Detailed explanation-1: -A Layer 2 Broadcast is any frame with a Destination MAC address of FFFF. FFFF. FFFF . This is a MAC address specifically reserved for Broadcast Frames.

Detailed explanation-2: -The Ethernet broadcast address is distinguished by having all of its bits set to 1. As such, its MAC address is the hexadecimal value of FF:FF:FF:FF:FF:FF. This address is used to transmit data to all of the hosts on the local subnet.

Detailed explanation-3: -Within a layer 2 switch environment exists a broadcast domain. Any broadcast traffic on a switch will be forwarded out all ports with the exception of the port the broadcast packet arrived on. Broadcasts are contained in the same layer 2 segment, as they do not traverse past a layer 3 boundary.

Detailed explanation-4: -Layer 2 broadcasts are sent to the broadcast mac address ffff:ffff:ffff if ethernet and so can be received by any device. Layer 3 broadcasts are sent to the broadcast network address, which for an ip network of 10.1. 1.0/24 would be 10.1. 1.255.

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