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Q:

Convert FACE1234 16 to dotted decimal. 

Answer:
Q:

What are the six OSPF route types?

Answer

Intra-area, inter area, El, E2, Nl, and N2.

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Q:

What are the purposes of areas in an OSPF network?

Answer

Areas allow the design of a hierarchical network. Routes can be summarized or blocked in an area to reduce the amount of routing information on internal OSPF routers.

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Q:

Why is BGP a better choice for Internet routing than the IGPs?

Answer

RIP version 1 and IGRP are classful protocols and do not advertise subnet mask information. RIP version 2 has a limited network diameter of 15 hops. EIGRP, OSPF, and IS-IS use computational intensive algorithms for determining a shortest path. BGP relies on simple techniques for best path selection and loop detection, and can handle the number of network prefixes required for Internet routing.

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Q:

Explain the difference between the forwarding of a unicast IP packet and the forwarding of a multicast IP packet.

Answer

Unicast IP packets are forwarded based on the destination IP address. Multicast packets are forward based on the source IP address. If a multicast packet is received on the interface used to send a unicast packet back to the source, the multicast packet is forwarded to multicast neighbors. If the multicast packet is received on an interface that would not be used to send a unicast IP packet back to the source, the packet is discarded.

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Q:

What is the first thing that BGP checks to determine if a prefix is accessible?

Answer

BGP checks the NEXT_HOP attribute to determine if the NEXT_HOP is accessible or in the IP routing table.

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