24 Questions
What is the purpose of the error detection and correction bits (EDC) in the link layer protocol?
To detect and correct errors in the transmitted data
What is the primary difference between half-duplex and full-duplex communication?
The direction of data transmission
What is the purpose of the Internet checksum at the transport layer?
To detect errors in data transmission
What happens when the receiver detects errors in the received data?
It requests retransmission of the data
Where is the link layer protocol implemented?
In the adapter (NIC)
What is the limitation of error detection mechanisms?
They are not 100% reliable
What is the primary responsibility of the data-link layer?
Transferring datagrams from one node to another over a link
What is the term used to describe the process of adding a header and trailer to a datagram?
Framing
What is the purpose of 'physical addresses' in frame headers?
To identify source and destination nodes
What is the main reason for error detection in the data-link layer?
Signal attenuation
What is the term used to describe the process of controlling the pace of data transmission between nodes?
Flow control
What is the term used to describe the data unit of the data-link layer?
Frame
What is the primary purpose of a 32-bit IP address?
To get a datagram to a destination IP network
What is the primary function of ARP?
To translate IP addresses to MAC addresses
What is unique about each adapter on a LAN?
Its MAC address
What is the purpose of MAC address allocation?
To ensure MAC address uniqueness
Why is a MAC address considered portable?
Because it is a flat address
What is the analogy for a MAC address?
A Social Security Number
What is the purpose of the ARP protocol?
To determine the MAC address of a node given its IP address
What is the purpose of the TTL in an ARP table?
To set a timer for when the mapping will be forgotten
What happens when a node receives an ARP query packet?
It sends a response with its MAC address
What is the purpose of the preamble in an Ethernet frame?
To synchronize the receiver and sender clock rates
What happens when a node receives an Ethernet frame with a non-matching destination address?
It discards the frame
What is the purpose of the CRC in an Ethernet frame?
To detect errors in the frame
Test your understanding of the data link layer, including error detection and correction, link layer addressing, and types of communication channels. Learn about the principles behind data link layer services and prepare for your Computer Science and Engineering course.
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