Chapter 6, Problem R1RQ

Consider the transportation analogy in Section 6.1.1. If the passenger is analagous to a datagram, what is analogous to the link layer frame?

Program Plan Intro

Link Layer:

• In the OSI (Open Systems Interconnection) model, data link layer is the 2^nd layer. This layer is used to transfer data between neighboring network nodes on a Wide Area Network or on the same Local Area Network.
• This layer uses error detection bits and it corrects the errors.

Explanation of Solution

Transportation analogy:

In the section 6.1.1, the travel agent plans a trip for tourists from different places.

• The travel agent decides the convenient plans for the tourists and the agent makes three reservations.
• The three reservation trips are direct between two adjacent locations and also they contain different transportation modes.
• Here, if the passengers are analogous to the datagram, then the transportation modes are analogous to the link layer frame.

Therefore, the transportation modes are analogous to link layer frame.