Exam 9: Wide Area Networks

Which WAN technology is designed to work with a variety of commonly used layer-2 protocols and is sometimes called a layer-2.5 technology because it inserts a 4-byte header that contains its own information between the layer-2 frame and the layer-3 IP packet?.

__________ is a term that refers to the time delay in converting input packets to output packets.

A star topology is:

A star architecture:

Full mesh networks are inexpensive.

Compare the ring, star, and mesh architectures.Provide one example of when each one might be better to use compared to the others.

Explain the differences between CIR and MAR.

A WAN with a ring topology can use full or half duplex circuits

A T1 circuit provides a data rate of 1.544Mbps.

Datagrams are connection-oriented.

In North America, a T1 circuit has ______ 64Kbps channels.

Today, a common carrier that provides long distance services is typically called a local exchange carrier.

Which of the following type of networks permit packets from separate messages to be interleaved?

A _____________ is a user's connection into a packet switched service.

Which of the following is a primary advantage of a VPN in comparison to a private WAN connection?

Which of the following is not a key issue to be considered when selecting a WAN service?

With a virtual private network, users create permanent virtual circuits through the Internet called:

Frame relay is a reliable packet service.

A _______________ is a particular type of network that uses circuits that run over the Internet but that appears to the user to be a private network.

VPNs offer high security because they operate through the Internet.