CS601 Handouts Updated Set 2

Cs601 Reading Material:

Updates Will Be Provided On Weekly Basis In Group's Description.

Note : All The Material Is Taken From LMS If You Find Any Error Please Contact Me On

Communication: Sharing of Information (Local or remote).

Telecommunications: Communication at a Distance (includes telephony, telegraph, and television etc.)

Data communications: Exchange of data between two devices via some form of transmission media.

Effectiveness of a Data Communication System:

The effectiveness of a Data Communication System depends on the following factors:

Delivery:

When data is sent from one place to another correctly and successfully, this is called delivery. Accuracy:

When data is sent, it must be accurate, which means that there must be no errors.

Timeliness:

For data to be considered timely, it must be sent within a reasonable amount of time.

The difference in packet arrival times in a network, which affects how consistently data is sent at regular intervals, is called jitter.

A data communications system has five components:

~ Sender

~ Receiver

~ Transmission medium

~ Protocol

~ Message

Following are the different forms of Information

~ Text

~ Numbers

~ Images

~ Audio

~ Video

Data Flow between two devices in the following modes:

Simplex: In simple terms, simplex is like talking on a one-way street. While in simplex mode, data can only go from one device to another. The device that receives the data cannot send it back. Like a TV remote control, you can tell it what to do (like changing stations), but it doesn't Jitter get any information from the TV.

Half Duplex: It is like talking on a walkie-talkie. Data can be sent and received in this mode, but not at the same time. Like switching places in a chat. People listen to each other when they talk and talk to each other when they listen. Changing between sending and getting is possible, but not both at the same time.

Full Duplex: Communication that works both ways is like a normal phone call. There is time for both people to talk and listen. Like having a street that goes both ways, data can flow in both directions at the same time. This is like how we talk to each other in real life—we can both talk and listen at the same time, which makes dialogue smooth and natural.

Network: Interconnection of a set of devices capable of communication

Host: In computer networks, a host is any device that is connected to the network, like a computer or printer. Each host has its own unique IP address, which lets other devices on the network talk to each other and share data.

Connecting Device: In networks, a connecting device is either hardware or software that lets devices talk to each other by controlling network traffic and managing data transfers easier.

A network must be able to meet a certain number of criteria such as:

~ Performance

~ Reliability

~ Security

Physical Network Attributes:

Link: It refers to a way for two or more devices to talk to each other or a connection that lets them share info. Different types of media, like wired (like Ethernet cables and fiber-optic lines) or wireless (like Wi-Fi and Bluetooth) technologies, can be used to make links.

Type of Connection

Point-to-Point