Aztu student: Rzayev Khayal Teacher: Valiyeva Irada Group: 102a5 Faculty: Transportation and Logistics

AZTU

• Student: Rzayev Khayal
• Teacher: Valiyeva Irada
• Group: 102a5
• Faculty: Transportation and Logistics
• Topic: Connection to the Internet

Wired Internet Connections

• Dial-up connections
• Standard phone lines and a modem
• Computer dials a number for your ISP
• All Internet programs use the connection
• Applications might need configured

Wired Internet Connections

• High-speed broadband connections
• Any connection faster than dialup
• Networks share the broadband connection
• All users access the same connection
• T or DSL lines common
• Home use increasing due to
• Lower cost
• Increased availability

Wired Internet Connections

• ISDN
• Offers speeds up to 1.5 Mbps
• Uses standard phone lines
• Requires special equipment
• Simultaneous use of phone and data

Wired Internet Connections

• DSL
• Offers speeds up to 30 Mbps
• Uses modified phone lines
• Needs special DSL modem
• Simultaneous use of phone and data
• Asynchronous DSL
• Different up and download speeds
• Synchronous DSL
• Variable DSL
• Speed changes based on traffic

DSL Connections

Wired Internet Connections

• Cable modems
• Speeds up to 3 Mbps
• Uses cable TV wires
• Requires a cable modem
• Simultaneous use of TV and data

Software Accessing The Internet

• Application programming interface (API)
• Simplifies connection to network devices
• Allows any application to access Internet
• UNIX API uses sockets
• Windows API uses winsock

Software Accessing The Internet

• Network drivers
• Control access to the hardware
• Ethernet and dial-up require a driver
• API connects to the driver

API and Drivers

Wireless Internet Connection

• Wireless WAN (WWAN)
• Wireless network over a large area
• Uses radio signals to transfer data
• Speeds range from 1 to 100 Mbps
• Antennas required
• Subject to atmospheric disturbances

Wireless Internet Connection

• Satellite services
• Internet access in remote regions
• Suitable for home and office use
• Needs a VSAT at the client
• Very Small Aperture Terminal
• Connects to the satellite
• Modem connects to the VSAT

Wireless Internet Connection

• Wireless LANs (WLAN)
• Network without wires
• Connects to a broadband LAN connection
• WAP are wired directly into the LAN
• Nodes use wireless

Wireless LAN

Wireless Internet Connection

• Wireless security
• Crucial to protect wireless transmissions
• Encryption protects transmissions
• Wireless Encryption Protocol is quite weak
• Wi-Fi Protected Access is stronger
• MAC address of trusted computers
• War driving