Module 3.7 "Data Access"

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

-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

MAC Address:

A Media Access Control address is a hardware address that uniquely identifies each node on a network. These addresses are physically embedded on the Ethernet NIC and are represented in hexadecimal notation

True or False? Data Link addresses are physical so they never change in the data link frame from source to destination.

False

True or false? The right-most part of an IP address is used to identify the network that a device belongs to.

False

Network layer source and destination addresses:

Responsible for delivering the IP packet from the original source to the final destination, which may be on the same network or a remote network

Data link layer source and destination addresses

Responsible for delivering the data link frame from one network interface card (NIC) to another NIC on the same network

True or false? Frames exchanged between devices in different IP networks must be forwarded to a default gateway.

True

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

-destination MAC, source MAC

What is used to determine the network portion of an IPv4 address?

Subnet mask

What two parts is an IP address broken down into?

-Network portion (IPv4) or Prefix (IPv6): Left-most part of the address that indicates the network in which the IP address is a member. (All devices on the same network will have the same network portion of the address) -Host portion (IPv4) or Interface ID (IPv6): The remaining part of the address that identifies a specific device on the network. This portion is unique for each device or interface on the network. -Note: The subnet mask is used to identify the network portion of an IP address from the host portion