6,410 views
5 votes
5 votes

In Ethernet, the source address field in the MAC frame is the _______ address.

  1. original sender's physical
  2. previous station's physical
  3. next destination's physical
  4. original sender's service port

4 Answers

Best answer
7 votes
7 votes
Answer is B) previous station's physical address

Layer 3 or network layer destination IP address never changes through out the path of IP packet, except from cases like NATing or VPN. Only thing which changes is source and destination MAC addresses at data link layer. Router caches the MAC address of next hops it needs to send packet to, it replaces the source and destination MAC address in it and send it to physical layer.
selected by
4 votes
4 votes

802.3(Ethernet) MAC Frame :
Source Address(SA): Consists of 6 bytes. This is the physical address of the sender of the frame.

802.3 is a standard specification for Ethernet, a method of physical communication in a local area network (LAN) .In general, 802.3 specifies the physical media and the working characteristics of Ethernet.

0 votes
0 votes
Next Destination Physical Address.
0 votes
0 votes

Answer is B

Sources Address, 6 Bytes - The MAC address of the
sending station, usually written in hex. The source
address is usually built into a piece of equipment at
manufacture. The first three bytes would identify the
manufacturer and the second three bytes would be
unique to the equipment. However there are some
devices, test equipment for example, in which the
address is changeable.
 
Answer:

Related questions

7 votes
7 votes
4 answers
1
go_editor asked Jun 13, 2016
3,225 views
Repeated execution of simple computation may cause compounding ofround-off errorssyntax errorsrun-time errorslogic errors
3 votes
3 votes
3 answers
2
go_editor asked Jun 12, 2016
2,957 views
A public key encryption systemallows anyone to decode the transmissionsallows only the correct sender to decode the dataallows only the correct receiver to decode the dat...
3 votes
3 votes
4 answers
3
go_editor asked Jun 12, 2016
6,722 views
The network $198.78.41.0$ is aClass A networkClass B networkClass C networkClass D network
6 votes
6 votes
1 answer
4
go_editor asked Jun 10, 2016
4,310 views
Which Project $802$ standard provides for a collision-free protocol?$802.2$$802.3$$802.5$$802.6$