Introduction Introduction toto

Computer AdministrationComputer Administration

Computer NetworksComputer NetworksAdvanced TopicsAdvanced Topics

Computer Networks – Computer Networks – Advanced Advanced TopicsTopics

ISO’s OSI Reference ModelISO’s OSI Reference Model TCP/IP Protocol SuitTCP/IP Protocol Suit Types of AddressesTypes of Addresses Address TranslationAddress Translation IP AddressingIP Addressing Interconnection DevicesInterconnection Devices WAN InterconnectionWAN Interconnection Network Services & ProtocolsNetwork Services & Protocols

ISO’s OSI Reference ModelISO’s OSI Reference Model

TCP/IP and OSI ModelTCP/IP and OSI Model

Types of AddressTypes of Address

Address TranslationAddress Translation

Computer NameComputer Name

TCP/UDP Port NumberTCP/UDP Port Number

IP AddressIP Address

MAC AddressMAC Address

DNS

ARP/RARP

Domain Name SystemDomain Name System The The Domain Name System Domain Name System (DNS) is used on the (DNS) is used on the

Internet and on many private networks.Internet and on many private networks. DNS Converts Domain Name to IPDNS Converts Domain Name to IP

IP AddressingIP Addressing

•The IP addresses are unique and universal.

•An IP address is a 32-bit address.

Classes of IP AddressClasses of IP Address

UNICAST IP Addresses : Class A, B & C

MULTICAST IP Addresses : Class D

Net-ID & Host-IDNet-ID & Host-ID

IP Addresses - Class AIP Addresses - Class A

Gateway Address ?

IP Addresses - Class BIP Addresses - Class B

IP Addresses - Class CIP Addresses - Class C

Loop Back & Private Loop Back & Private AddressesAddresses

Loop back Address : 127.0.0.1

Interconnection DevicesInterconnection Devices

Interconnection DevicesInterconnection Devices

Repeater / HUBRepeater / HUB What, Where & When to use?What, Where & When to use?

Bridge / Layer 2 SwitchBridge / Layer 2 Switch What, Where & When to use?What, Where & When to use?

Router / Layer 3 SwitchRouter / 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 – InterconnectionsWAN – Interconnections

Dialup ConnectionDialup Connection ??

ISDNISDN ??

DSLDSL ??

ATMATM ??

Network Services & Network Services & ProtocolsProtocols

Data Data ServicesServices

File SharingFile Sharing FTPFTP 2121

EmailEmail SMTP & POPSMTP & POP ??

Web Web ServicesServices

Web ServerWeb Server HTTP / HTTPSHTTP / HTTPS ??

Proxy/Firewall Proxy/Firewall ServerServer NAT/PATNAT/PAT ??

MultimediaMultimedia

ServicesServices

Voice Over IPVoice Over IP

SIP & H.323SIP & H.323 ??Audio & Audio & VideoVideo

ConferencinConferencingg