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Which of the following options is correctly matched?

Which of the following options is correctly matched? Correct Answer X.25 ­ MTU is 576

The correct answer is option 4.

Concept:

The MTU (Maximum Transmission Unit) is the size of the largest datagram that can be sent over a network.

Option 1:Token Ring(16Mbps) ­ MTU is 65,535.

False, Token ring has a bandwidth of 16 Mbps and the maximum transferable unit is 17,914 bytes per frame.

Option 2: FDDI­ MTU is 4,464.

False, Fiber Distributed Data Interface (FDDI) is a standard for data transmission in a local area network and the maximum transmission unit of FDDI is 4,352 bytes.

Option 3: Ethernet ­ MTU is 17,914

False, The Maximum transmission unit of Ethernet ­is 1,500 bytes. This does not include the Ethernet header of 18 or 20 bytes and is the theoretical maximum amount of data that can be transmitted by the physical link. 

Option 4: X.25 ­ MTU is 576

True, An X. 25 network connects to public data networks by dedicated circuits, and the maximum transmission unit is 576 bytes.

Hence the correct answer is X.25 ­ MTU is 576.

Additional Information 

Network Default maximum transfer unit in Bytes
Hyperchannel 65,535
16Mb Token Ring 17,914
4Mb Token Ring 4464
Fiber Distributed Data Interface  4,352
Ethernet 1,500
IEEE 802.3 1,492
X.25 576
PPP 296

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