Computer Networking
When a group of computers is connected together in a small area without the help of telephone lines, it is called

Value added network (VAN)
None of these
Remote communication network (RCN)
Wide area network (WAN)
Local area network(LAN)

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Computer Networking
Error detecting code is

an error-detecting code based on a summation operation performed on the bits to be checked
None of these
a code in which each expression conforms to specify rules of construction, so that if certain errors occur in an expression, the resulting expression will not conform to the rules of construction and
a check bit appended to an array of binary digits to make the sum of all the binary digits.
the ratio of the data units in error to the total number of data units

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Computer Networking
Which of the following is true when describing a multicast address?

Packets are delivered to all interfaces identified by the address. This is also called a one-to-many address.
Packets addressed to a unicast address are delivered to a single interface.
Identifies multiple interfaces and is only delivered to one address. This address can also be called one-to-one-of-many.
These addresses are meant for nonrouting purposes, but they are almost globally unique so it is unlikely they will have an address overlap.

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