NETWORK LAYER
NETWORK LAYER PROTOCOLS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
ensure that all the data has arrived and is not corrupted
|
|
|
ensure that the packet has been sent to the right place
|
|
|
tell the computer what protocols were used
|
|
|
ensure that the user is logged on
|
Detailed explanation-1: -A checksum is a small-sized block of data derived from another block of digital data for the purpose of detecting errors that may have been introduced during its transmission or storage. By themselves, checksums are often used to verify data integrity but are not relied upon to verify data authenticity.
Detailed explanation-2: -A checksum algorithm is used to check for errors in data transmission. It works by calculating a numerical value based on the number of bits in a packet of data. This numerical value is attached to the packet. When the packet reaches its destination, the same checksum algorithm is applied to the data it contains.
Detailed explanation-3: -A checksum is an error-detection method in a the transmitter computes a numerical value according to the number of set or unset bits in a message and sends it along with each message frame. At the receiver end, the same checksum function (formula) is applied to the message frame to retrieve the numerical value.