tailieunhanh - Lecture Network Certification: Chapter 12 - Microsoft Press

Chapter 12 - Remote network access. This chapter includes contents: Types of remote network connections, public switched telephone network (PSTN), modems, modem communications, configuring a modem, Virtual Private Network (VPN) communications,. | Chapter Overview Using Remote Connections SLIP and PPP WAN Technologies Types of Remote Network Connections Computer to Internet service provider (ISP) Computer to private network Computer to computer Network to network Public Switched Telephone Network (PSTN) Technical name for the standard voice telephone system Also known as the Plain Old Telephone Service (POTS) Analog, circuit-switched network Works with asynchronous modems to transmit data between computers at almost any location Typically uses copper-based, twisted-pair cable with RJ-11 jacks Modems A modem (modulator/demodulator) is required to convert a computer’s digital signals to the analog signals used by the PSTN. At the other end of the connection, another modem converts the analog signals back to digital. Modem Communications Configuring a Modem Most modems support the Plug and Play standard. Modems typically need an interrupt request (IRQ) and an input/output (I/O) port to communicate with the . | Chapter Overview Using Remote Connections SLIP and PPP WAN Technologies Types of Remote Network Connections Computer to Internet service provider (ISP) Computer to private network Computer to computer Network to network Public Switched Telephone Network (PSTN) Technical name for the standard voice telephone system Also known as the Plain Old Telephone Service (POTS) Analog, circuit-switched network Works with asynchronous modems to transmit data between computers at almost any location Typically uses copper-based, twisted-pair cable with RJ-11 jacks Modems A modem (modulator/demodulator) is required to convert a computer’s digital signals to the analog signals used by the PSTN. At the other end of the connection, another modem converts the analog signals back to digital. Modem Communications Configuring a Modem Most modems support the Plug and Play standard. Modems typically need an interrupt request (IRQ) and an input/output (I/O) port to communicate with the computer. For external modems, the IRQ and I/O port are assigned to the serial port. For internal modems, you configure the device itself to use specific hardware resources. Serial ports use a chip called a universal asynchronous receiver-transmitter (UART) to manage communications. For today’s high-speed modems, you should always use a 16550 UART. Virtual Private Network (VPN) Communications The remote user connects to the Internet by using a modem to dial in to a local ISP. The network is permanently connected to the Internet and has a server that is configured to receive incoming VPN connections. The remote computer and the network server establish a secured connection across the Internet. This technique is called tunneling, because the connection runs across the Internet inside a secure conduit. Point-to-Point Tunneling Protocol (PPTP) Encapsulation Integrated Services Digital Network Integrated Services Digital Network (ISDN) is a high-speed digital dial-up service that .

• Quản trị mạng
• Lecture Network+
• Internet protocol
• Network security
• Network troubleshooting
• WAN technologies
• Virtual Private Network