Module 1 Flashcards
Identify five components of data communication.
Sender, Receiver, Medium, Message, Protocol
Define data communications and networking.
The exchange of data between two devices via some form of transmission medium such as a wire cable.
Identify three data flows.
Sinplex, Half Duplex, Duplex
Describe three network criteria.
Performance
Bandwidth, Jitter, Delay
Reliability
Frequency of failure, recovery time
Security
Unauthorized access
Draw two types of connection, with examples.
Point to Point
Point to multipoint
Draw five categories of topology, with examples.
Mesh, star, bus, ring, hybrid
Explain four categories of networks, with examples.
Lan
Wan
Man
Internet
Distinguish between an internet and the Internet.
Internet = Internet internet = any collection of interconnected networks
Describe the hierarchical organization of the Internet.
Divided in to Autonomous Systems
International AS
National AS
Regional AS
Local AS
Define a protocol with the three key elements.
Syntax:the structure or format of the data to exchange
Semantics: the meaning of each section of bits
Timing: when and how fast
Explain the need of standards.
Public agreement for the interoperability of data and technologies among devices manufactured by different companies
What is a protcol?
A protocol defines how something is implemented. It defines the what, how and why
List the five layers in the Internet network model.
Application = ftp, http, smtp, ssh Transport = UDP, TCP Network = ip, arp. icmp, igmp Data-Link Physical
List the four address types in the Internet network model, with the corresponding layer in which each address type is used.
Application = Port # Transport = Protocol # Network = IP address Data Link = Mac Address Physical = n/a
Show the change of addresses in a packet that is delivered to a destination through three different physical networks, given an example of a network or networks.
Application = Port # Transport = Protocol # Network = IP address Data Link = Mac Address Physical = n/a
