4A0-105: Nokia Virtual Private LAN ServicesDemo

By Nokia · Question Mode

QuestionQ20

VPLS Features

A routed VPLS is attached to an IES interface. The VPLS service MTU is 1400 bytes, and the IES interface IP MTU is 1500 bytes. Which statement is true?

  • A Any IP packet larger than 1386 bytes will be fragmented.
  • B Any IP packet larger than 1400 bytes will be fragmented.
  • C Any IP packet larger than 1414 bytes will be fragmented.
  • D Any IP packet larger than 1500 bytes will be fragmented.
Explanation

The operational IP MTU for an IP interface bound to a VPLS cannot exceed the VPLS service MTU minus the 14-byte Ethernet header. Therefore, a 1400-byte VPLS service MTU yields an effective IP MTU of 1386 bytes, so larger IP packets are fragmented when permitted.

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