Computer Networking: A Top-Down Approach - Chapter 1 Introduction

A collection of flashcards covering key concepts from Chapter 1 of 'Computer Networking: A Top-Down Approach', focusing on key terms, protocol definitions, and fundamental networking principles.

What is the aim of Chapter 1 in the networking course?

To provide a 'big picture' introduction to terminology related to the Internet.

What does the term 'Internet' refer to?

A 'network of networks' that consists of interconnected ISPs.

What are packet switches used for in networking?

They forward packets, which are chunks of data, and can include routers and switches.

Define what a protocol is in the context of computer networks.

Protocols define the format, order of messages sent and received among network entities, and specify actions taken on message transmission.

Give an example of a commonly used network protocol.

HTTP, which is used for transferring web pages.

What is the role of internet service providers (ISPs)?

ISPs provide access to the Internet for end users and interconnect different networks.

What kind of media can transmission links utilize in a network?

Physical media types include fiber, copper, radio, and satellite.

What is packet-switching in networking?

Packet-switching is a method where hosts break application-layer messages into packets to be sent over the network.

What is the difference between packet-switching and circuit-switching?

Packet-switching allows for sharing of resources based on demand, while circuit-switching allocates dedicated resources for the duration of a call.

What does the term 'throughput' refer to in networking?

Throughput is the rate at which bits are transferred from sender to receiver; it can be instantaneous or average.

What are some potential threats to network security?

Packet interception, IP spoofing, and denial of service attacks.

What are the two main functions performed by the network core?

Forwarding packets and routing them based on destination addresses.

What are the four sources of packet delay in a network?

Nodal processing, queueing delay, transmission delay, and propagation delay.

Explain the importance of layering in network architecture.

Layering simplifies network design by breaking down the system into manageable sections, allowing for modularity and easier maintenance.

What is the primary disadvantage of circuit-switching?

Resources can be idle and not used when not actively in use, leading to inefficiencies.

What is the purpose of encryption in network security?

To ensure confidentiality by protecting data being transmitted from unauthorized access.