Physical media - computer network, Computer Networking

Assignment Help:

Physical Media

In order  to define what is meant by a physical medium let us reflect on the brief life of a bit. Consider  a bit travelling from one end system through a series of links and router to  another end  systems. The source end system first transmits the bit and shortly thereafter the first router in the series receive the bit the first router then transmits the  bit and shortly thereafter a second router the bit and so  on. Thus the bit when  travelling  from  sources  to destination passes  through a series of transmitter receiver pairs. For  each transmitter receiver pair the bit is sent by propagating electromagnetic waves or optical pulses  across  a physical medium.

Physical  media can be divided in to  two categories: Guided  and  unguided media guided media include twisted pair cable  coaxial  cable  and fiber optic  cable. Unguided  media is free space. Unguided media, which  are those that provide  a conduit  from one  device  to another  include  twisted pair  cable  coaxial  cable and  fiber poetic cable. A signal  travelling  along  any of these media  is directed and  contained by the physical limits  of the  medium.

Unguided Media Transport electromagnetic  waves without  using a physical  conductor. This  type of communication  is often  referred to as  wireless  communication. Signals are normally  broadcast  through  free  and thus  available  to anyone who has a device capable  of receiving  them.

 

318_Physical Media.jpg

                                                                  figure classes of transmission media


Related Discussions:- Physical media - computer network

Write the definition of ipx and udp, Write the definition of IPX and UDP ...

Write the definition of IPX and UDP IPX: Inter-network Packet Exchange supports the transport and network layers of the OSI network model. It provides fast, unreliable, communi

Network service model - network layer and routing, Network Service Model ...

Network Service Model The network  service  model  defines  the characteristics of end to end  transport of data between  one edge of the  network  to the  other  that is betwe

Dns - server attacks, DNS - Server Attacks It’s not so easy to list al...

DNS - Server Attacks It’s not so easy to list all the associated attacks as they are evolving way so fast. As any error of flaw is identified, a patch is released in response

Describe the meaning of wan technologies, Question 1: a. What is xDSL a...

Question 1: a. What is xDSL and enumerate the benefit of such a technology? b. Name some of the typical applications of xDSL and the different types and standards of xDSL.

What are the drawbacks of ethernet cabling, What are the drawbacks of Ether...

What are the drawbacks of Ethernet Cabling? The Ethernet cabling ahs the following drawbacks: 1. Ethernet is not a high-level performer in high-load environments. This proto

Explain the two modes of ip security, Question 1 Describe the architecture...

Question 1 Describe the architecture and usage of ISDN Question 2 Write about different network structures in use Question 3 Explain the concept of framing in Data Li

Benefits of mpls vpn- wireless technology, 1) The school has implemented a ...

1) The school has implemented a pilot MPLS VPN which is being evaluated to replace the Bell South Frame Relay solution that provides connectivity to the Bascom Palmer Eye-Institute

Illustrate the advantages of VLANs, Q. Illustrate the Advantages of VLANs? ...

Q. Illustrate the Advantages of VLANs? - Cost and time reduction in moving stations from one group to another - Creation of virtual workgroups - Security Position of

What is virtual lans, Q. What is Virtual LANs? Virtual LANs - LAN...

Q. What is Virtual LANs? Virtual LANs - LAN (Local area network) configured by software not by physical wiring Virtual LANs - Divides a LAN into logical, in

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd