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Data Communication

Lec-01 : Introduction

Description

• Data communications refer to the transmission of the digital data between two or many computers, and a computer network or data network is a telecommunications network that allows computers to interchange data.

• The physical connection between networked computing devices is well-established by using either cable media or wireless media.

Prerequisite

• Better to have basic computer concepts such as what is keyboard, mouse, monitor, input, output, primary memory, and secondary memory, etc.

Topics Covered

• DTE and DCE • Data Link Layer • Network Layer • Transport layer • Application Layer

For whom

• For students to help them to understand the basic to advanced level of expertise in Data Communication and Computer Networking

Reference books

1.“Visual Information Representation, Communication, and Image Processing (Optical Science and Engineering)” by Ya-Qin Zhang

2. “Applied Data Communications and Networks” by B Buchanan

3. “Fundamentals of Multimedia: United States Edition” by Ze-Nian Li and Mark S Drew

Q & A
Exam Questions

Q1 . Define data communication & explain the effectiveness of a data communications system depends on which four fundamental characteristics.
Q2 . Explain 802. Standard (DQBA) and 802.2 logical link control.
Q3 . Design sliding windows protocol in detail.
Q4 . Write a neat structure of 802.3 MAC frame format writes about each field in the frame.
Q5 . With diagram explain about Token Passing related to collision-free Protocol.
Q6 . Explain Shannon Capacity for NIsy Channel.
Q7 . Explain the Slotted ALOHA Protocol in detail.
Q8 . Difference between pure ALOHA and slotted ALOHA protocol.
Q9 . Explain the Configuration of HDLC in detail.
Q10 . Explain the Coaxial cable with a neat diagram. mention the applications of Coaxial cable.

By using DNS Internet domain and host names are translated into Ip addresses.The names that we type in our Web browser address bar that DNS automatically converted into the IP address of Web servers hosting those sites. Distributed database implement

When some shared data two or more processes are reading or writing and its final result depends on who runs the process and when.

When we are concerned about latency then turn off because it delays transmission of data until there is no reasonable amount of data is present. When we turned off the Nagle Algorithm then that data is sent immediately by the protocol stack.

Command-line utility program is nothing but Netstat. It gives information about the current transmission Control protocol or Internet protocol(TCP/IP) settings of connections.

: Firewall and Antivirus both are security applications that are used in networking. Antivirus is software. It's used to protect computers from malicious software, viruses, adware, or spyware. A firewall is doesn't protect the computer from viru

Tracert is a window utility program. It is used to trace the route taken by data from the router to the destination network. It also shows the number of hopes that are pass during the transmission route.

Delta modulation is used to convert analog signals to digital signals and vise versa. When the quality is not important then it is used to convey the voice signals. DPCA's simplest form is Delta modulation. DM is one bitter two-level version of DPCM.

The minimum rate when signals can be sampled without any errors that are known as Nyquist rate or frequency. Nyquist frequency is equal to twice the bandwidth of the span.

To pass or reject the signals by frequency then Microwave and RF filters are used. To determine the quantity of insertion loss the filter function is used. This also checks the phase shift for signals which are pass-through filters.

NOS is a Network Operating System, it is specialized software. NOS provides network connectivity to computers to communicate with other computers and connected devices.

By Observing the first octet of the IP address
Class A : 1st octet begins with 0 bit
Class B: 1st octet begins with 10 bits
Class C : 1st octet begins with 110 bits

Spamassassin is nothing but a Mail filter that is used to identify spam. It uses a diverse test to identify the unsolicited bulk email that means spam. In the email, the header test is applied and using advanced statistical methods convert the conten

FDD is Frequency Division Duplex is the multiple access method used the Uplink and Downlink frequency band.
Uplink: 1920 MHz – 1980 MHz
Downlink: 2110 MHz – 2170 MHz

FER is used to measure the number of transmission errors. Will increases with an increase in the number of calls. To avoid this minicell or mobile site increases the power to a point so that FER is reduced to an acceptable amount. This results in a

Brouter is nothing but Bridge Router. Brouter is a device that acts as a bridge and also routers. Data forwards between networks is done by Bridge and also it routes the data to the specified system within a network.

Individual users can use Reverse traffic channels in their actual calls to transmit traffic between a single mobile station to one more base station.

The data forwarding controls central intelligence with the SDN, this network controller known as the control plane(CP)
The hardware that makes forwarding on the command of the CP is the Data Plane(DP).

High Definition Multimedia Interface, this is an audio-video interface that’s used for both transmit digital audio and video streams of data and the data are uncompressed and encrypted.

The three most popular methods of protecting Wireless Access Points:
1. Employing MAC address filtering
2. Using WPA2

To secure the Linux server, you must follow the following, in order
Audit: By using Lynis scan the system, scanned each category separately, and generate a hardening index for the next step.
Hardening: After completing auditing, hardening is d

: UDP port 161: It is used for sending and receiving requests.
UDP port 162: It is used for receiving traps from managed devices.

Any unauthorized activity on a computer network is a network instruction. Detecting instructions depend on whether defenders having a clear understanding of how attacks work.

On the POP3 mail server a mailbox and remote server connect then the POP3 session is created. And after disconnects, the remote user from the POP3 mail server then ends the POP session is ended.

The split horizon is not useful to send rout back information in the direction from where the original update came.

The application which receives incoming e-mail from local and outgoing e-mail forward for delivery. The computer which is dedicated to run such applications called a mail server

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Course Feature

Category Computer Science
Language English
Price 69.00
Validity 1 Year
Rating 5 | 1 Reviews
Q & A 25
Exam Questions 10
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Data Communication

Lec-01 : Introduction

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Computer Science

1.Introduction

2.DTE & DCE

3.Data Link layer

4.Network layer

5.Transport layer

6.Application layer

Data Communication

Lec-01 : Introduction

1.Introduction

2.DTE & DCE

3.Data Link layer

4.Network layer

5.Transport layer

6.Application layer

Q1 . What do you know about DNS?

Q2 . How Does The Race Condition Occur?

Q3 . Why would someone want to turn off Nagle's algorithm?

Q4 . What is Netstat?

Q5 . How would you differentiate between Firewall and Antivirus?

Q6 . What is Tracert?

Q7 . What is Delta modulation?

Q8 . Define the Nyquist rate?

Q9 . What are RF and microwave filters?

Q10 . What is NOS?

Q11 . How can you identify the IP class of a given IP address?

Q12 . What Is Spamassassin?

Q13 . What Are Fdd And What Are The Frequencies It Uses

Q14 . Explain The Cmda Interference “frame Error Rate.”?

Q15 . What is Brouter?

Q16 . Explain the Reverse Traffic Channels?

Q17 . What are the Control Plane (CP) and Data Plane (DP) in SDN?

Q18 . What Is An Hdmi Optical Switch?

Q19 . Speaking of your home network, do you have a Wireless Access Point, and if so, how do you defend it?

Q20 . If you work with a Linux server, what are the three significant steps you must take to secure it?

Q21 . What ports are used in SNMP?

Q22 . What Is A Network Intrusion?

Q23 . What do you know about the POP3 session?

Q24 . What Is Split Horizon?

Q25 . What Is A Postfix Mail Server?

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Adhoc & Sensor

Operating Systems(OS)

Software Engineering(SE)

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