data and computer networks

Conside he wanao shown in Figure below in which a sava is connected to a router by a 100Mbps Imk with a 50ms propagation delay. Initially this router is also comected to two routers, adh over a SOMbps Imk with a 200ms propagation delay. A 10bps link connects a host and a cache (if prinant) to each of these routes and we assume that this link has 0 propagation delay. All packets in the network are 20.000 bits long To Me 9 2 What is the end-to-end delay from when a packet is transmitted by the senter to when it is recen es by be che in this case, we assume there are no cache, there's no queume delay at the Toe de padet processing delays at routers and nodes are all o O a. 250.62 ms O b. 400 us c. 200 us O d. 250 ms Conside the Qe-BNN protocol with a vender window size of N - 4 md a mume amba age of 1024. Suppose that at time I the next in-order packet that the receiver is specting has equaa numbe 226. Arume that the medium does not reonder meget vid of the following is a posible pair of values for the senden vond base base window) and externum pointes timer O a. send base=225; nextseqnum=228 O b. send base=224; nextseqnum=226 O c. send base=229; nextseqnum=233 O d. send base=228; nextseqnum=233 O e, send base=227; nextseqnum=232