COMPUTER NETWORKING

DATA LINK LAYER WIRED NETWORKS

WIRED LANS ETHERNET PROTOCOL

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the maximum size of an Ethernet frame?
A
1518 bytes
B
56 bytes
C
128 bytes
D
1024 bytes
Explanation: 

Detailed explanation-1: -The maximum frame payload is 1500 Bytes, this will offer the highest throughput.

Detailed explanation-2: -To recap, Ethernet has a minimum frame size of 64 bytes, comprising an 18-byte header and a payload of 46 bytes. It also has a maximum frame size of 1518 bytes, in which case the payload is 1500 bytes. If the message to be sent leads to a frame size of less than the 64-byte minimum, the additional bytes are padded.

Detailed explanation-3: -Since the IP packet is carried by an Ethernet frame, the Ethernet frame has to be larger than the IP packet. With the normal untagged Ethernet frame overhead of 18 bytes, the Ethernet maximum frame size is 1518 bytes.

Detailed explanation-4: -Ethernet MTU is 1500 without header and trailer and system MTU command is referencing to that. Swith by default (system MTU 1500 and access port) can maximun switch frames with 1518 bytes and 1522 bytes on Dot. 1Q.

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