Residential access: point to point access 口 Dialup via modem Up to 56kbps direct access to router (often less) g Can't surf and phone at same time: can 't be " always on O DSL: diqital subscriber line oo deployment: telephone company (typically) to 1 mb ps upstream tod day typically 256 kbps) s up to 8 Mbps downstream(today typically< 1 Mbps) o dedicated physical line to telephone central office Introduction 1-20
Introduction 1-20 Residential Access: Point to Point Access ❑ Dialup via modem ❖ Up to 56Kbps direct access to router (often less) ❖ Can’t surf and phone at same time: can’t be “always on” ❑ DSL: digital subscriber line ❖ deployment: telephone company (typically) ❖ up to 1 Mbps upstream (today typically < 256 kbps) ❖ up to 8 Mbps downstream (today typically < 1 Mbps) ❖ dedicated physical line to telephone central office
Residential Access: Cable modems O HFC: hybrid fiber coax s Asymmetric: up to 30Mbps downstream, 2 Mbps upstream Is shared broadcast medium u Network of cable and fiber attaches homes to ISP router Homes share access to router a Deployment: available via cable Tv companies Introduction 1-21
Introduction 1-21 Residential Access: Cable Modems ❑ HFC: hybrid fiber coax ❖ Asymmetric: up to 30Mbps downstream, 2 Mbps upstream ❖ Is shared broadcast medium ❑ Network of cable and fiber attaches homes to ISP router ❖ Homes share access to router ❑ Deployment: available via cable TV companies
Company Access: Local Area Networks Company /univ local area network(LAn connects end system to edge router 口 Ethernet: 冷10Mbs,10 MBps 1Gbps, 10Gbps Ethernet . Modern configuration end systems connect < into Ethernet switch 口LANs: chapter5 Introductio
Introduction 1-22 Company Access: Local Area Networks ❑ Company/univ local area network (LAN) connects end system to edge router ❑ Ethernet: ❖ 10 Mbs, 100Mbps, 1Gbps, 10Gbps Ethernet ❖ Modern configuration: end systems connect into Ethernet switch ❑ LANs: chapter 5
Wireless Access Networks u Shared wireless access network connects end system to router router Via base station aka access point base 口 Wireless LANs: station 802116/gWiF):11054Mbps a Wider-area wireless access g provided by telco operator g w1Mbps over cellular system mobile (EVDO, HSDPA) hosts Next up(?): WiMAX (10s Mbps) over wide area Introduction 1-23
Introduction 1-23 Wireless Access Networks ❑ Shared wireless access network connects end system to router ❖ Via base station aka “access point” ❑ Wireless LANs: ❖ 802.11b/g (WiFi): 11 or 54 Mbps ❑ Wider-area wireless access ❖ Provided by telco operator ❖ ~1Mbps over cellular system (EVDO, HSDPA) ❖ Next up (?): WiMAX (10’s Mbps) over wide area base station mobile hosts router
Wireless Technologies coverage Bluetooth WWAN (3G, 4G? UWB RFID WMAN (Wi-Max) WLAN (Wi-Fi) WPAN OO E Introduction 1-24
Introduction 1-24 Wireless Technologies WWAN (3G,4G?) WLAN (Wi-Fi) WPAN WMAN (Wi-Max) Bluetooth UWB RFID coverage