Telemedicine

Hardware Classifying the networks Transmission Technology Scale Point to Point Links Broadcast Links

Point to Point Sending a message to a friend In small forms of notes Different paths Problem of choosing the shortest path Linking couples… Transmission of PACKETS Different paths, different prices HOW SHOULD WE FIND THE SHORTEST PATH? Unicast

Broadcast Common communication channel Ex. Wireless Networks Address Field  Too Important Multicast

Unicast, Broadcast, Multicast

Scale of the networks

Scale of the networks

Scale of the network

BAN (Body Area Network) LET’S GO SEE WHAT THE BOOK HAS TO OFFER. IMPLANTABLE DEVICES IEEE 802.15.6

PAN (Personal Area Network) Bluetooth networks (IEEE 802.15) One Master, Multi Slaves (Wirelessly) Master to Slave, NO Slave to Slave RFID  HOMEWORK

LAN (Local Area Network) 1 to 2 KM 100 Mbps to 10 Gbps Ethernet (IEEE 802.3)

Ethernet Cable named BUS Computers Using Hub to Extend Collision Arbitration Switched Ethernet

WLAN Wireless Local Area Network AP (Access Points) WIFI  IEEE 802.11 Switch or hub WIFI  IEEE 802.11

VLAN Virtual Local Area Network Different parts of a company

HAN (Home Area Network) Smart Homes EXTENSIBILITY  IMPORTANT

Power Line Networks LAN – WIFI … Not used in IRAN.

CABLE TV Both TV and Internet

WIMAX (MAN)

WAN (Wide Area Network) Scale: Country Continent All the world Host Subnet Transmission Lines Switching Equipments Ex. PSTN (Public Switched Telephone Network)

WAN VPN  Connecting LAN s of different offices Using Internet Links  Not Good ISP (Internet Service Provider) Giving service to a country  It has operators All WANs  Routing Algorithms & Forwarding Algorithms Satellite WANs Mobile Telephones

Network of Networks internet or internet network Infrastructure Internet vs internet Internet  Specific concept

Keywords Gateway  Routers are also some kind of gateway Routers  Connecting multiple networks HOMEWORK  What is a router?