Introduction to Computer Administration Computer Networks Advanced Topics.

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Presentation transcript:

Introduction to Computer Administration Computer Networks Advanced Topics

Computer Networks – Advanced Topics ISO’s OSI Reference Model ISO’s OSI Reference Model TCP/IP Protocol Suit TCP/IP Protocol Suit Types of Addresses Types of Addresses Address Translation Address Translation IP Addressing IP Addressing Interconnection Devices Interconnection Devices WAN Interconnection WAN Interconnection Network Services & Protocols Network Services & Protocols

ISO’s OSI Reference Model

TCP/IP and OSI Model

Types of Address

Address Translation Computer Name Computer Name TCP/UDP Port Number TCP/UDP Port Number IP Address IP Address MAC Address MAC Address DNS ARP/RARP

Domain Name System The Domain Name System (DNS) is used on the Internet and on many private networks. The Domain Name System (DNS) is used on the Internet and on many private networks. DNS Converts Domain Name to IP DNS Converts Domain Name to IP

IP Addressing The IP addresses are unique and universal. An IP address is a 32-bit address.

Classes of IP Address UNICAST IP Addresses : Class A, B & C MULTICAST IP Addresses : Class D

Net-ID & Host-ID

IP Addresses - Class A Gateway Address ?

IP Addresses - Class B

IP Addresses - Class C

Loop Back & Private Addresses Loop back Address :

Interconnection Devices

Repeater / HUB Repeater / HUB What, Where & When to use? What, Where & When to use? Bridge / Layer 2 Switch Bridge / Layer 2 Switch What, Where & When to use? What, Where & When to use? Router / Layer 3 Switch Router / Layer 3 Switch What, Where & When to use? What, Where & When to use? Gateway (Proxy/Firewall) Gateway (Proxy/Firewall) What, Where & When to use? What, Where & When to use?

WAN – Interconnections Dialup Connection Dialup Connection ? ISDN ISDN ? DSL DSL ? ATM ATM ?

Network Services & Protocols Data Services File Sharing FTP21 SMTP & POP ? Web Services Web Server HTTP / HTTPS ? Proxy/Firewall Server NAT/PAT? MultimediaServices Voice Over IP SIP & H.323 ? Audio & Video Conferencing