. Answer the following questions concerning Chapter 2: 1.1 A Network Interface Card (NIC) in a computer has a MAC address assigned, but never has an IP address. b. false a, true 12 At what layer of the five-layer model does a router operate? a Application b. Transport c. Network d. Data Link 13 Which is NOT a medium used by the physical layer? a. Fiber optic cables cabling c. Wireless radio waves b. Electrical d. Metal bars 14 What are the (partial) contents of a typical layer 3 packet? a. Recipient's IP address, sender's IP address, data b. Recipient's e-mail address, sender's e-mail address data c. Recipent's port number, sender's port number, data d. Recipient's MAC address, sender's MAC address, data .s In which layers of the five-layer model does an Ethernet network interface card operate? (Choose two.) a Physical b. Data Link d. Transport c. Network 1.6 Different networks may use different sizes of frames. a. true b. false 17 Which pair of layers are NOT peer layers a Application layer in the sender and transport b. Transport layer in the sender and transport layer e Application layer in the sender and application d. Network layer in the sender and network layer in layer in the receiver in the receiver layer in the receiver the receiver Which is a sample MAC address used in layer 2 of the model? a. 128.34.56.1 b. 01-23-45-AB-CD-23 c. 80