Lecture (02) Introduction to Networks II

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Lecture (02) Introduction to Networks II By: Dr. Ahmed ElShafee ١ Agenda Types of Networks Network element identifications (logical address hardware address) Discovering your home LAN Discovering WAN from your home Packets trip inside your home LAN Packets trip inside your enterprise LAN Packets trip from your home LAN to WAN ٢

Types of Networks: Local Area Networks (LAN) LAN is a communications network that interconnects a variety of device, providing means for information exchange among these devices. ٣ LAN (2) Characteristics 1. Small scope, building, or cluster. 2. Owned by organization which need communication facility. 3. Data rate very high. ٤

LAN (3) Configuration, and types: Switched LAN (Ethernet LAN) Wireless LAN Fiber LANS ٥ Types of Networks: Wide Area Networks (WAN) Consists of number of interconnected switching nodes, providing exchange between different LANs or terminals over huge geographical area ٦

WAN (2) Transmission is being routed through these nodes to the destination device. Nodes are not concerned with contents of the, their purpose is to provide a switching facility that will move the from node to node. ٧ WAN (3) Used for terminal/computer, and computer/computer communication. ٨

WAN (7) ٩ Types of Networks: Metropolitan Area Networks (MAN) middle ground between LAN and WAN private or public network large area It has two forms Leased line Terrestrial links ١٠

MAN (2) ١١ MAN (3) ١٢

MAN (4) ١٣ Network element identifications (logical address hardware address) ADSL Router Internet ١٤

١٥ AC:D1:B8:D3:CA:03 ١٦

١٧ AC:D1:B8:D3:CA:03 ١٨

Discovering your home LAN ١٩ AC:D1:B8:D3:CA:03 ١٩ ADSL Router Internet ٢٠

٢١ AC:D1:B8:D3:CA:03 ٢١ ADSL Router Internet Discovering WAN from your home Facebook Internet AC:D1:B8:D3:CA:03 ٢٢ ٢٢ ADSL Router

٢٣ ٢٤

Facebook Internet 197.32.132.120 AC:D1:B8:D3:CA:03 R1 =? ٢٥ ٢٥ ADSL Router ٢٦

69.171.230.5 Facebook 216.58.210.238 Internet 197.32.132.120 AC:D1:B8:D3:CA:03 R1 =? ٢٧ ٢٧ ADSL Router Packets trip inside your home LAN ٢٨ AC:D1:B8:D3:CA:03 ADSL Router Internet

٢٩ sending Router ٣٠

sending Router ٣١ Receiving Router ٣٢

Receiving Router ٣٣ Packets trip inside your enterprise LAN 1-P1-2-P1-1-P2-2-P2-٣٤

sending 1-P1-2-P1-1-P2-2-P2-1 ٣٥ sending 1-P1-2-P1-1-P2-2-P2-1 2 1 P2 ٣٦

sending 1-P1-2-P1-1-P2-2-P2-2 2 P2 ٣٧ Receiving 1-P1-2-P1-1-P2-2-P2-2 ٣٨

Receiving 1-P1-2-P1-1-P2-2-P2- sw2 sw1 2 P2 ٣٩ Receiving 1-P1-2-P1-1-P2-2-P2- sw1 pc1 1 P2 ٤٠

Packets trip from your home LAN to WAN 69.171.230.5 Facebook 216.58.210.238 Internet AC:D1:B8:D3:CA:03 ٤١ ٤١ 197.32.132.120 R1 =? ADSL Router R1-P1- R2-P1- R2-P1- R3-P1- R3-P1- R4-P1-197.32.202.150 R2-P2- R1-P2- R2-P2- R3-P2- R3-P2- R4-P2- R4-P2- FB.Server- FB.Server- ٤٢

R1-P1- sending R2-P1- R2-P1- R3-P1- R3-P1- R4-P1-197.32.202.150 R2-P2- R1-P2- R2-P2- R3-P2- R3-P2- R4-P2- R4-P2- FB.Server- FB.Server- R1 R1 P1 ٤٣ R1-P1- sending R2-P1- R2-P1- R3-P1- R3-P1- R4-P1-197.32.202.150 R2-P2- R1-P2- R2-P2- R3-P2- R3-P2- R4-P2- R4-P2- FB.Server- FB.Server- R1 R2 197.32.202.150 R1 P2 R2 P1 ٤٤

R1-P1- sending R2-P1- R2-P1- R3-P1- R3-P1- R4-P1-197.32.202.150 R2-P2- R1-P2- R2-P2- R3-P2- R3-P2- R4-P2- R4-P2- FB.Server- FB.Server- R2 R3 197.32.202.150 R2 P2 R3 P1 ٤٥ R1-P1- sending R2-P1- R2-P1- R3-P1- R3-P1- R4-P1-197.32.202.150 R2-P2- R1-P2- R2-P2- R3-P2- R3-P2- R4-P2- R4-P2- FB.Server- FB.Server- R3 R4 197.32.202.150 R3 P2 R4 P1 ٤٦

R1-P1- sending R2-P1- R2-P1- R3-P1- R3-P1- R4-P1-197.32.202.150 R2-P2- R1-P2- R2-P2- R3-P2- R3-P2- R4-P2- R4-P2- FB.Server- FB.Server- R4 FB.Server 197.32.202.150 FB.Server R4 P2 FB.Server ٤٧ R1-P1- Replying R2-P1- R2-P1- R3-P1- R3-P1- R4-P1-197.32.202.150 R2-P2- R1-P2- R2-P2- R3-P2- R3-P2- R4-P2- R4-P2- FB.Server- FB.Server- FB.SERVER R4 FB.Server 197.32.202.150 FB.Server R4 P2 ٤٨

R1-P1- Replying R2-P1- R2-P1- R3-P1- R3-P1- R4-P1-197.32.202.150 R2-P2- R1-P2- R2-P2- R3-P2- R3-P2- R4-P2- R4-P2- FB.Server- FB.Server- R4 R3 197.32.202.150 R4 P1 R3 P2 ٤٩ R1-P1- Replying R2-P1- R2-P1- R3-P1- R3-P1- R4-P1-197.32.202.150 R2-P2- R1-P2- R2-P2- R3-P2- R3-P2- R4-P2- R4-P2- FB.Server- FB.Server- R3 R2 197.32.202.150 R3 P1 R2 P2 ٥٠

R1-P1- Replying R2-P1- R2-P1- R3-P1- R3-P1- R4-P1-197.32.202.150 R2-P2- R1-P2- R2-P2- R3-P2- R3-P2- R4-P2- R4-P2- FB.Server- FB.Server- R2 R1 197.32.202.150 R2 P1 R1 P2 ٥١ R1-P1- Replying R2-P1- R2-P1- R3-P1- R3-P1- R4-P1-197.32.202.150 R2-P2- R1-P2- R2-P2- R3-P2- R3-P2- R4-P2- R4-P2- FB.Server- FB.Server- R1 R1 P1 ٥٢

Thanks,.. See you next week (ISA), ٥٣

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