The document discusses various topics related to communications and computer networks. It covers different types of physical connections and wireless technologies used for data transmission. Some of the key network components discussed include modems, switches, routers and different protocols. The document also examines local area networks, wide area networks and different network architectures like bus, star and mesh networks. Network security measures such as firewalls and intrusion detection systems are also summarized.

1. ‫وووو‬ ‫وووو‬ ‫وو‬‫سسسسسسس‬ ‫سسسسسسس‬‫سسسسسسس‬ ‫سسسسسسس‬
‫سسسس‬ ‫سسسس‬‫سسسس‬ ‫سسسس‬

2. ‫سسسسس‬ ‫سسسس‬ .‫س‬ ‫سسسسسسسس‬ ‫سسسسسسس‬ ‫سسسس‬ISBN: 978-9933-13-286-6‫سسسسسس‬ ‫سسسس‬ ‫سسسسسسسس‬ ‫سسسسس‬ ‫سسسس‬ ‫سسس‬ ‫س‬2017.
2

3. Communications and Networks
3

4. .
.
dial-upDSLcable.
.
.
.
.

5. E-mail
Texting
Videoconferencing
Electronic commerce
Connectivity
The Wireless Revolution
5
Communications

6. 

6
Communication Systems

7. Sending and receiving devices
Connection devices


Data transmission specifications
Communication channel


7
Communication Systems

8. Communication Channels



Physical Connections
•
Wireless Connections
•
•BluetoothWi-FimicrowaveWiMaxcellularsatellite.
8
Communications

9. Twisted-pair cable


Coaxial cable

80

9
Physical Connections

10. Fiber-optic cable

petabit 1petabit1gigabits.(

Dial-up.
10
Physical Connections

11. Bluetooth
33

Wi-Fi (wireless fidelity(



11
Wireless Connections
‫س‬‫س‬‫س‬‫س‬‫س‬‫س‬
‫س‬‫س‬‫س‬‫س‬‫س‬‫س‬
Maximum speed
‫س‬‫س‬‫س‬‫س‬‫س‬‫س‬‫س‬
Standard
54Mbps 802.11g
600Mbps 802.11n
2.6Gbps 802.11ac
10.5Gbps 802.11ax

12. Microwave





12
Wireless Connections

13. WiMax (Worldwide Interoperability for Microwave Access(



13
Wireless Connections

14. Cellular


Satellite
.
Intelsat.

.

14
Wireless Connections

15. Uplink
Downlink

.
Global positioning system (GPS(.
15
Wireless Connections

16. Modems
modulator-demodulator
Modulation
Demodulation

transfer ratemegabits per second) (Mbps(.

MB 700.1 51.10 09
16
Connection Devices

17. Modems
DSL


.
17
Connection Devices

18. 18
Connection Devices
DSL (digital subscriber line(
.
USB
Cable modem
.
DSLUSB
Wireless modemWWAN (wireless wide area network)
modem

USB

19. 19
Data Transmission
:
Bandwidth

.
.



20. 20
Bandwidth
Voicebandlow bandwidth
dial-up

Medium band
​
Broadband
DSL
Baseband

.

21. 21
Protocols


HTTPS hypertext transfer protocol secure

TCP/IP (transmission control protocol/Internet protocol)
.

)1
)2packets

22. 22
Protocols
Identification
IPIP address (Internet protocol address(.
IP.
IP
domain name server (DNS(IP.
URLKhaleBakro.blogspot.com.trDNSIP

23. 23
Protocols
DNSIP

24. 24
Protocols
www.synology.comIP

25. 25
Networks
computer
network.
.

26. 26
Networks
Node.
Client
Server:
Directory server
Host
Router
Switch

27. 27
Networks
((Hub
Network interface cards (NIC(
LAN.
Network operating systems (NOS(
Network administrator

28. 28
Networks Types
Local Area Networks (LAN(
.
.
)LANs(.
network gatewayLAN.
.
Ethernet.
Ethernet LANs.

29. 29
Networks Types
LAN(

30. 30
Networks Types
Home Networks
LAN.
.
.
.

31. 31
Networks Types
Wireless LAN
Wireless LAN (WLAN(.

wireless access pointBase station.


hotspots


32. 32
Networks Types
PAN))Personal Area Network


PANBluetooth,33
Metropolitan Area Networks
100

LANMAN
Wide Area Networks

MAN100.

WANs

33. 33
Networks Types
PANLANMANWAN

‫ف‬‫ف‬‫ف‬‫ف‬‫ف‬Description
‫ف‬‫ف‬‫ف‬‫ف‬‫ف‬
Type
LAN
Home
WLAN
PAN
100 MAN
WAN

34. 34
Network Architecture

.
.




35. 35
Network Architecture
Bus network
.
.

36. 36
Network Architecture
Ring network



37. 37
Network Architecture
Star network





38. 38
Network Architecture
Tree network



hierarchical network


39. 39
Network Architecture
Mesh network






40. 40
Strategies
.

client/serverpeer-to-peer
Client/server networks
.

41. 41
Strategies
client/server networks..
Server WindowsMac OS X Server, Linux, Solaris.

.


42. 42
Internet Technologies
Intranet



Extranet


.

43. 43
Network Security
.
.
:
firewall

proxy server.



44. 44
Network Security

45. 45
Network Security
Intrusion detection systems (IDS(


IDS

46. 46
Network Security
Virtual private networks (VPN(

VPN





47. 


Multiple-choice.

Matching.




47

48. 




48