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

• A.When the router first receives a frame from a LAN.
• B.After the forwarding table is checked.
• C.After the IP datagram is extracted from the L2 frame.
• D.Immediately before the IP packet is encapsulated for transmission.

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Which of the following statements about IP address subnetting is TRUE?

• A.Subnetting adds a layer of hierarchy in the addressing structure.
• B.Subnetting helps routers make faster forwarding decisions.
• C.Subnetting increases routing advertisement stability.
• D.Subnetting reduces the number of route entries advertised by the router.

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Which of the following best describes the operation of the Media Dependent Adapter (MDA)?

• A.The MDA converts data from its incoming physical format into an internal format and provides some minimal buffering.
• B.The MDA buffers data and applies Quality of Service (QoS) to classify and treat the data appropriately.
• C.Excess data is discarded by the MDA and the remaining data forwarded for QoS processing.
• D.The MDA contains the flexible fast path complex used for forwarding data.

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From a customer's perspective, how does a VPRN service operate?

• A.All sites are connected to a routed network.
• B.All sites are connected to the Internet.
• C.All sites are connected to a switched network.
• D.All sites are connected to a single wire.

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With a subnet mask of 255.255.255.224, which of the IP addresses below are valid host addresses? (Choose all that apply)

• A.17.23.119.63
• B.87.99.12.159
• C.95.11.22.93
• D.192.11.25.87

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