Q: LAN Broadcasts

Wendell
By Wendell September 18, 2018 09:05

To answer some #CCNA questions, you need to think like a network analyzer (e.g., Wireshark). What values sit in the headers of an Ethernet frame or IP packet? In this next sample question, you’ll get a chance to think about the Ethernet header for a LAN broadcast.

 

The Question

Which answers are accurate about a LAN broadcast frame sent by host A?

A) The Source MAC is the Broadcast Address (but the Destination MAC is not)

B) The Destination MAC is the Broadcast Address (but the Source MAC is not)

C) Both the MAC Addresses are the Broadcast Address

D) The Type field is the Broadcast Type value

 

Figure 1: Figure Reference

 

Answer Post in a Few Days!

I’ll post an answer post in a few days. Watch for it! It should be the next post in chronological order as well, so watch for the link at the bottom of this page (just above the comments section).

A: Encapsulation
A: LAN Broadcasts
Wendell
By Wendell September 18, 2018 09:05
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4 Comments

  1. Null0 September 19, 07:18

    Hello
    B
    I guess

    Reply to this comment
  2. Nicholas September 19, 08:07

    B) The Destination MAC is the Broadcast Address (but the Source MAC is not)

    Reply to this comment
  3. Carlos September 19, 13:09

    The answer is B!!!

    Reply to this comment
  4. Alidoski October 24, 07:54

    B is the right one because Host A send a packet to broadcast destination 255.255.255.255 to the whole devices in the same LAN,
    A is not correct becuz the source shoud not be be broadcast address they send message and that msg contain specific IP address that include source IP address but Destination can be Broadcast or Unicast also Multicast addresses depend on Topology .
    C we don’t have anything like that in networking .
    for D I didn’t understand what it mean exactly but type field it could be unicast or multicast not only broadcast .

    Reply to this comment
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