Q$1.$ Determine if the following statements are True or False

$1-$ A switched WAN could be connected as a mesh or a star topology. $($T $)$

$2-$ The medium access control of point$-$to$-$point links is the responsibility of the data link layer. $(T)$

Hub

$3-$ One of the disadvantages of the star topology is that it has a single point of failure. $(T)$

$4-$ The network layer in a sender machine interacts with the data link layer in the same machine by exchanging protocol data units $($PDUs$).(F)$

$5-$ The DSL or optical fiber $($eLife$)$ Internet connection from your home to Etisalat can be considered a point$-$to point WAN. $(T)$

$6-$ If $3$ computers are connected to each other using a bus topology, we can say that there are $3\text{'}$ point$-$to$-$point links connecting them together. $(f)$

$7-$ In the Internet model, the presentation layer is responsible for machine$-$independent representation of data. $($F$)$

$8-$ The data flow between a computer's mouse and the computer central processing unit $($CPU$)$ is simplex. $($T$)$ one Direction at a time

Q$2.$ Choose the correct answer

$1-$ Over a point$-$to$-$point communication link, if a frame is received with an error, the error should be discovered and corrected at

$($a$)$ the data link layer

$($b$)$ the transport Layer

$($c$)$ all of the above

$2-$ If $6$ nodes are connected in a network with a mesh topology, the number of links in the network is

$($a$)15$

$($b$)$ higher than $15$

Iess than or equal to $15$