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Free 4A0-100 Exam Braindumps (page: 26)

Page 25 of 89
PDF with 352 Questions

At what stage in the packet forwarding process, is the IP packet header examined?

  1. When the router first receives a frame from a LAN.
  2. After the forwarding table is checked.
  3. After the IP datagram is extracted from the L2 frame.
  4. Immediately before the IP packet is encapsulated for transmission.

Answer(s): C



What happens next after an incoming packet is de-encapsulated from the Layer 2 frame in a Nokia 7750 router?

  1. The IP datagram is encapsulated in the appropriate Layer 2 frame by the MD
  2. The IP datagram passes through the switch fabric to reach the egress IOM.
  3. The IP datagram is passed to the IOM.
  4. A lookup is performed in the FIB to determine the egress interface.

Answer(s): C



Which of the following IP header fields contains information that indicates whether routers are allowed to fragment a packet?

  1. Header checksum.
  2. Fragmentation offset.
  3. Flags.
  4. Identification.

Answer(s): C



What is the main purpose of IP fragmentation?

  1. To limit the number of the IP addresses in the network.
  2. To improve the efficiency of transmissions over the network.
  3. To reduce the number of resources required to send a large frame over the network.
  4. To allow IP datagrams to be carried over Layer 2 networks with varying MTU sizes.

Answer(s): D






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