1. True or false? Frames exchanged between devices in different IP networks must be forwarded to a default gateway.
- True
- False
Explanation: The correct answer is True. When two devices are on different IP networks, frames cannot be sent directly to the receiver since it is on a different logical network. The frames must first be forwarded to a default gateway (router).
2. True or false? The right-most part of an IP address is used to identify the network that a device belongs to.
- True
- False
Explanation: The correct answer is False. It is the left-most portion of an IP address that identifies the network. The right-most portion is used to identify the specific device or interface.
3. What is used to determine the network portion of an IPv4 address?
- subnet mask
- MAC address
- right-most part of the IP address
- left-most part of the MAC address
Explanation: It is the subnet mask used in IPv4 that is used to determine the network portion of an IPv4 address.
4. Which of the following statements are true regarding network layer and data link layer addresses? (Choose three.)
- Data link layer addresses are logical and network layer addresses are physical.
- Network layer addresses are expressed as 12 hexadecimal digits and data link layer addresses are decimal.
- Network layer addresses are logical and data link addresses are expressed as 12 hexadecimal digits.
- Data link layer addresses are physical and network layer addresses are logical.
- Network layer addresses are either 32 or 128 bits in length.
- Data link layer addresses are 32 bits in length.
Explanation: MAC addresses are physical addresses and 48 bits or 12 hex digits in length. IPv4 addresses and IPv6 addresses are logical. IPv4 addresses are 32 bits and IPv6 addresses are 128 bits.
5. What is the order of the two addresses in the data link frame?
- source MAC, destination MAC
- destination MAC, source IP
- destination IP, source IP
- destination MAC, source MAC
- source IP, destination IP
Explanation: The data link frame addressing consists of a destination and source MAC address in that order.
6. True or False? Data Link addresses are physical so they never change in the data link frame from source to destination.
- True
- False
Explanation: The correct answer is False. Data link addresses change within the data link frame when the receiving device is not on the same network.