artech house a professionals guide to data communication in a tcp ip world 2004 phần 1 pps

... 17 8 A. 5 .1 Error Detection 17 8 A. 5.2 Error Correction 17 9 APPENDIX B Frames and Headers 18 1 B .1 Chapter 1: A TCP/ IP World? 18 1 B .1. 1 UDP Header 18 1 B .1. 2 TCP Header 18 1 B .1. 3 IPv4 Header 18 2 B .1. 4 ... Contents TLFeBOOK A Professional’s Guide to Data Communication in a TCP/ IP World E. Bryan Carne Artech House, Inc. Boston • London...

Ngày tải lên: 14/08/2014, 13:20

... that supported many terminals (often characterized as dumb terminals). Server: A data processing device that stores data, organizes and maintains databases, and delivers copies of data files to ... Several strategies are being attempted to bring IPv6 into the Internet mainstream. Three of them are: create a separate IPv6 backbone; send IPv6 datagrams in IPv4 tunnels; and send I...

Ngày tải lên: 14/08/2014, 13:20

... following data stream which has been divided into bytes for easier reading: ⇐ 011 111 10/ 010 111 11/ 111 111 01/ 111 110 11/ 011 111 10 The first 8 bits and the final 8 bits are underlined—they are the beginning ... beginning and ending flags, the transmitter inserts a 0 (denoted 0 for clarity) after sequences of five 1s. This makes the transmitted data stream ⇐ 011 111 10 010 111 110...

Ngày tải lên: 14/08/2014, 13:20

... Bridging 89 Table 5 .1 Comparison of Frames on Different LANs Field Size Ethernet IEEE 802.3 Token Ring FDDI Preamble Variable 0×AA-AA -A A-AA-AA -A A-AA-AB 0×AA-AA-AA-AA- AA-AA-AA-AA No 0×AA-AA MAC ... link X.25-2 LAP-B Physical X.25 -1 X. 21 Packet LAP-B X. 21 Data link Physical Packet network Node stack Header Network interface layer Packet LAP-B Header LAP-B Trailer DATA DATA ≤...

Ngày tải lên: 14/08/2014, 13:20

... in IPv4 and IPv6 datagrams. Encapsulating header Authentication header Original datagram D (1) IPSec authentication tunneling datagram D(2) ESP authentication ESP header ESP trailer Original datagram ... shows an L2TP datagram encapsulated by PPP and encrypted by IPsec. The original datagram is wrapped in a PPP frame. The PPP frame is then incorporated in a new IP datagram with...

Ngày tải lên: 14/08/2014, 13:20

... transport overhead to form a frame. The transport overhead contains data that monitors and manages the optical line between the originating and terminating SONET multiplexers. Payloads that originate from ... bit Framing Bit for Frame n 19 3 rd bit T -1 Frame Payload 1 bit = 0.648 secsµ Byte 23 Byte 24 Byte 24 11 1 11 0 1 In data bytes, the 8th bit is set to 1 to mee...

Ngày tải lên: 14/08/2014, 13:20

... 1 111 100 01 c 10 000 011 C 11 000 011 2 11 110 010 d 10 00 010 0 D 11 00 010 0 3 11 110 011 e 10 00 010 1 E 11 00 010 1 4 11 110 100 f 10 00 011 0 F 11 00 011 0 5 11 110 1 01 g 10 00 011 1 G 11 00 011 1 6 11 110 110 h 10 0 010 00 H 11 0 010 00 ... 0 010 111 0 t 10 010 100 T 11 010 100 NAK 0 011 110 1 u 10 010 1 01 U 11 010 1 01 DLE 00 010 000 v 10 010 110 V 11...

Ngày tải lên: 14/08/2014, 13:20

... When added to the IP datagram, they form the IP frame. Data service unit Part of data circuit-terminating equipment (DCE) serving a digital line. Data terminal equipment A device that creates, ... The act of sharing data among devices. The act of transfer - ring data among data processing machines over communication links under the control of communication protocol(s...

Ngày tải lên: 14/08/2014, 13:20

... beginning and ending of each IP datagram. Server A device that stores data, organizes and maintains databases, and delivers copies of data files to clients on demand. A process that stores and distributes ... 97 VLAN-unaware station, 97 Virtual private network (VPN), 10 7–20 authentication, 11 3, 11 4 15 , 11 7 encryption, 11 3 14 extranet VPN, 11 9 firewall, 11 6 18 IP s...

Ngày tải lên: 14/08/2014, 13:20