$1$ TCP True or XR$20$ False $(7$ marks$)$ Answer the following true or false questions on Layer $3.$ Question $1($a$)$ All autonomous systems on the Internet use the same intra$-$AS routing protocol. $($b$)$ In a distance$-$vector routing algorithm, each node has a map of the entire network and determines the shortest path from itself to all other nodes in the network. $($c$)$ OSPF uses BGP for routing among areas. $($d$)$ In the BGP routing algorithm, each AS advertises to its neighbors its estimates of the shortest distances from the AS to all possible destination ASs. $($e$)$ With hot potato routing, the goal is for a router to choose a path for packets out of the AS based on the lowest cost for the remaining portions of the path $($outside the AS$)$ are minimized. $($f$)$ When an OSPF route sends its link state information, it is sent only to those nodes directly attached neighbours $($only to nodes directly attached$)?($g$)$ When a BGP router receives an advertised path from its neighbour, it must add its own identity to the received path and then send that new path on to all of its neighbours.