Multiplexing mechanisms, routers, TCP window size, cellular networks and security in computer networks

NETWORK AND SECURITY
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Topic 4.
Question 5.
The multiplexing mechanisms in the LCC sublayer within a multipoint network provides the error
control mechanism through provision of repetitive requests automatically with the flow control and
management.
Question 7.
To be able to connect to different physical networks, routers are made with several network
interface data cards that help in the reduction of the redundancy in the network and data. In the
event that one NIC is corrupted, the other functions in its place to reduce data redundancy.
Question 19.
During the internet connection, the MAC address is successfully mapped with the internet protocol,
and an entry, that is new, is added to the address resolution protocol. The addition of entries is
dynamic to allow static entries to be added. The MAC address, using a predetermined time, can be
removed from the address resolution protocol using a set time depending on the disconnection
status of the network.
Question 20.
The header of the Ethernet is modified following the addition of a new address on the router to send
the data packets to the new destination.
Topic 6.
Question 5.
Located from 0 to 65535, storing port number destinations are counted and therefore one is added
to the maximum value 65535 to determine the number of bits to be used as storing port destination
number 65536.
Question 8.
A new port is allocated when a new tab is opened on the web browser and a network connection is
attempted each time. Because the data packets are labelled specifically for each port, the data is not
interrupted nor modified.
Question 14.
The handshake process is carried in 3 steps.
The steps are:
The client attempts a connection to the server via the network.
The server acknowledges the connection by giving a feedback.
The client acknowledges the response from the server.