Network plus is the basic part for network

1. NETWORK FUNDAMENTAL
Department of Communication Navigation and Surveillance
By: Zakirullah Atif ACAI 1

2. PREVIOUS LECTURE
 Modem
 Network Interface Card
 Repeater, Hub
 Switch, Bridge
 Router
By: Zakirullah Atif ACAI 2

3. CHAPTER3
Understanding Network Media
By: Zakirullah Atif ACAI 3

4. LECTURE OUTLINE
 Network media
 Guided and unguided media
 STP and UTP
 Fiber optic
By: Zakirullah Atif ACAI 4

5. NETWORK MEDIA
 Media provides the connectivity between end devices. Media is categorized in
two types; wired and wireless.
 Network media is the actual path over which an electrical signal travels as it
moves from one component to another
 It can be divided into two broad categories i.e.
 Guided Media
 Unguided Media
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Media
Guided
(Wired)
Coaxial
Cable
Fiber Optic
cable
Twisted
pair cable
Unguided
(Wireless)
By: Zakirullah Atif ACAI

6. DIFFERENCE BETWEEN WIRED AND WIRELESS
Characteristics Wired Wireless
Speed Fast Slow
Security Secure Less Secure
Reliability More Reliable Less reliable
Installation Hard to install Easy to install
Cost More cost Less Cost
Transferable NotTransferable Transferable
Flexibility Less Flexible More Flexible
By: Zakirullah Atif ACAI 6

7. GUIDED MEDIA
 Provide a channel from one device to another.
 It is the transmission media in which signals are limited to a specific path using wire or
cable
By: Zakirullah Atif ACAI
7

8. COAXIAL
 This cable is mainly used in bus topology.
 Since bus topology is no longer used in building a computer network, you will hardly ever see a computer connected
with this cable in real world.
 Still you should learn the specification of this cable for exam and interview purpose.There are two types of coaxial
cable;
 Thin net
 Thick net
By: Zakirullah Atif ACAI 8
Note: As much as the thickness of the
inner conductor is more it can transfer
the date to far distances.

9. TWISTED-PAIR CABLE
Twisted-pair cable is a type of cabling that is used for telephone communications
and most modern Ethernet networks. A pair of wires forms a circuit that can
transmit data.The pairs are twisted to provide protection against crosstalk, the
noise generated by adjacent pairs.
Two forms
 Unshielded twisted-pair (UTP)
 Shielded twisted-pair (STP)
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10. UTP & STP CABLE
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11. ADVANTAGES
 Installation is easy
 Flexible
 Cheap
 It has high speed capacity,
 100 meter limit
 Higher grades of UTP are used in LAN technologies like Ethernet.
By: Zakirullah Atif ACAI 11

12. CATEGORIES OF UTP CABLE
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13. STP
Shielded twisted-pair (STP) cable combines the techniques of shielding and wire twisting
By: Zakirullah Atif ACAI 13

14. WIRING STANDARDS
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568A StandardCombination 568B StandardCombination

15. CABLETYPE IN STP AND UTP
By: Zakirullah Atif ACAI 15
There are three types of cable according to connecting
 Straight Cable
 Cross Cable
 Rollover Cable

16. STRAIGHT CABLE
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Straight cable has 568A or 568B wiring on both ends
Straight cables are use to connect different devices.
1) Connect a computer to a switch/hub's
2) Connect a computer to /DSL modem'
3) Connect a router's to Computer
4) Connect a router's LAN port to a switch/hub's uplink port. (normally used for expanding network)
5) connect Switch to Computer

17. CROSS-OVER CABLE
By: Zakirullah Atif ACAI 17
 Cross-over cable has 568A on one end and 568B on the other
Is used to connect same devices
1. Connect a computer to computer
2. Connect a switch to switch
3. Connect a router to router

18. ROLLOVER CABLE
By: Zakirullah Atif ACAI 18
• Is Used to Router Configuration.

19. RJ45 CONNECTOR
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20. OPTICAL FIBER
Optical fiber is made of glass or plastic
It transmits signals in the form of light
Use reflection to guide light through a channel.
 Used in offices and even at homes for Internet,Telephone & CableTV access.
 For long distances especially betweenTelephone Exchanges & ISPs.
Fiber have two type
Single mode: is used in long distance
 More expansive
 Multi mode: is used in short distance
 Not expensive
By: Zakirullah Atif ACAI 20

21. FIBER OPTIC UNDER SEA
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22. SUMMARY
• Coaxial, fiber optic, and twisted media
• Wiring standards
• Broadband versus baseband transmission
• Simplex, half duplex, and full duplex modes
• Attenuation and data transmission rates
By: Zakirullah Atif ACAI 22

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Thank your
Ahmadzakir99@gmail.com
If you can dream it You can Do it 😊
By: Zakirullah Atif ACAI