d, d, DNS d, Legend DNS Domain Name Server M: Message d Destination address at layer i s: Source address at layer i n Next-hop address at layer i Routing table Static or dynamic process (2) date in A string of bits represented as electrical signals To next hop (15%) The above diagram depicted the protocol suite used by Internet. Please answer the following question a. (596) What are the names of the layer (1), (2), (3),(4), (5)? b. (496) What is the name of the address in layer (2)? What is the length of this address? (4%) What is the name of the address in layer (3)? What is the length of this address? (2%) What is the name of the address in layer (4)? d. Fill the blanks (5%) a. The_(1)_ layer is responsible for node-to-node delivery of frames. b. The_(2)_ layer has a specific duty: routing. c. The_(3)_layer carries out congestion control and flow control. 2, SCTP defined at the_(4)_ layer SMTP are protocol of_(5)_ layer d. e