Question

2. Describe ASK, explain how it works and why we use it:

  

3. Explain what PCM does and how it works:

  

4. Which of the following networking device(s) block(s) broadcast traffic, thus dividing networks into separate subnets? (Hint: only OSI Network layer devices can divide networks into separate subnets): Routers, Switches, Wireless Access Points (bridges)

  

5. List the three types of multiplexing from the text and explain how they work:

. List two network layer protocols and explain what they do:

  

6. Explain what the acronym “ARQ” stands for and explain how it works:

  

7. The Session and Presentation layers are explicit layers in the OSI model, but are embedded within the Application layer of the TCP/IP protocol stack. Explain what the Session and Presentation layers do.

Session:    

Presentation:    

8. How does the application layer handle security?

  

Answer 1

Answers:-

Q.1)

Amplitude Shift Keying(ASK)

• ASK is used to transfer digital data over the optical fiber.
• ASK is the form of modulation which represents the digital data as a variations in the various amplitude of the wave(carrier wave).
• ASK is using various binary symbol such binary symbol 1 is used for transmitting carrier wave and fixed frequency of fixed amplitude.
• There are various application of ASK as follows:

1. Tire Pressuring Monitoring System
2. Low Frequency RF
3. Home Automation Devices
4. Industrial Network Devics
5. Wireless Base Station

Q.2)

Pulse Code Modulations(PCM)

• Pulse Code Modulations is technique which digitally represent the analog signal(simpled analog signal).
• In PCM technique the signal transmission takes using free interference .
• PCM performs regular intervals for the better execution of simpled analog signals.

Q.3)

Routers

• It is a networking device that used to transfers the data packet to the computer network.
• The main task of routers is to give traffic direction i.e... routers are also called as traffic directing functions.
• Another task of routers is that connect different two line IP to the network.

Switches

• Switches are the network hardware device which task is connect computer network by the help of packet switching.
• Switch is used to add the various devices in the computer network.
• Switch is also used in OSI model or creating separate domain for every switch and its port.

Wireless Access Points(Bridge)

• Wireless access points are used for communication, using bridge it will allows multiple wireless access point for the multiple LANs.
• There are some bridges are found which only access single point to point required connection to another access points.
• It is most useable when their are multiple network needs an access wireless access point and also bridge is used.