tailieunhanh - Practical TCP/IP and Ethernet Networking- P65

Practical TCP/IP and Ethernet Networking- P65: The transmitter encodes the information into a suitable form to be transmitted over the communications channel. The communications channel moves this signal as electromagnetic energy from the source to one or more destination receivers. The channel may convert this energy from one form to another, such as electrical to optical signals, whilst maintaining the integrity of the information so the recipient can understand the message sent by the transmitter | Index 303 LAN port 186 MAN port 186 RS RS-232 189 239 RS-485 189 Satellites 255-61 advanced communications technology satellite ACTS 255 advantages satellite networks 258-9 applications satellite systems 259 bulk information broadcasting 260 full-duplex-based protocol 264 GEO satellites 256 geo synchronous earth orbit GEO 255 geostationary earth orbit GEO 256 GLOBALSTAR 256 information retrieval 260 IRIDIUM 256 LEO satellites 256 methods of optimizing TCP IP over satellite channels 266 avoidance techniques 267 congestion avoidance 267 large window extension TCP-LW 2667 random early detection RED 267 selective acknowledgment TCP-SACK 266 MobileLEO 256 point-to-multi-point link 255 remote control and login 259 satellite-to-satellite linking 256 spoofing 267 telecommunications 256 three-way handshake 264 266 very small aperture terminal VSAT 255 video conferencing 259 Security considerations 216 6-bit pseudo-random code 219 access control lists ACLs 220 authentication 219 229 hackers 216-8 information security policies 225-6 network security policies 233 network-sniffing device 217 PIN number 219 secure ID tag 219 security advisory services 226 security breaches 218 Servers embedded web servers 237 network time servers 190 print servers 188 first-come first-served basis 188 serial and parallel printers 188 remote access servers 189 global positioning system GPS 190 PPP or SLIP 189 Radius Kerberos or secureID 189 stand-alone devices 190 terminal servers 188 connect multiple 188 serial devices 188 thin servers 189 239 242 DIN rail package 189 Ethernet LANs 239 port redirector 189 signal-channel terminal servers 189 thin server applications 239 universal thin servers 239 Session layer 26 29 network connection 26 Shannon formula 7 Shannon-Hartley law 7 Simple mail transfer protocol SMTP 77 133 154 client 155 data command 155 processes 154 quit command 155 server 154-5 SMTP commands 155 TELNET connection 155 195 Simple network management protocol SNMP 150-1 153-4 176 210-1