A Professional’s Guide to Data Communication in a TCP/IP World phần 10 ppt

... contain additional facilities that are used to detect and isolate line and equipment problems. 2.2 Making a Data Call Consider a host (Host A) in a multilocation company that needs a data file to ... enough information to identify the datagram, the message includes the IP header and the first 8 bytes of the datagram payload. A listing of a destination unreachable fram...

Ngày tải lên: 27/06/2014, 00:20

... escape character within the IP datagram payload shall not inter- rupt transmission, PPP employs character stuffing to change the meaning of the offending character: • In the IP datagram, a character ... transmitted data stream ⇐01111 1100 10111 1101 11 1101 0111 1101 0 1101 111 110 At the receiver, the zeros after five ones are removed to leave the original data stream. 4.1.2.3 S...

Ngày tải lên: 14/08/2014, 13:20

... delivered to the Internet layer at 72 Wide Area Networks ATM adaptation layer ATM layer Physical layer AAL Convergence sublayer AAL Segmentation and reassembly sublayerAAL IP datagram 48 byte ... 1 protocol stack System 2 protocol stack Application Transport Internet Data link sub-layer Physical sub-layer Internet Data link sub-layer Physical sub-layer Data link sub-layer Physical sub...

Ngày tải lên: 14/08/2014, 13:20

... datagrams. Encapsulating header Authentication header Original datagram D(1) IPSec authentication tunneling datagram D(2) ESP authentication ESP header ESP trailer Original datagram D(1) IPSec encapsulating ... generates an IP datagram addressed to an enterprise destination. This datagram is encapsulated in a PPP frame and may be encrypted. It becomes the users data in a second IP...

Ngày tải lên: 14/08/2014, 13:20

... bytes 23 data bytes 23 data bytes 23 data bytes 23 data bytes 23 data bytes 23 data bytes 23 data bytes 23 data bytes 23 data bytes 23 data bytes 23 data bytes 23 data bytes 23 data bytes 23 data bytes 23 ... (ESF) D C D F D C D F D C D F D C D F D C D F D C D F Framing bits Subchannels F = Framing D = Data link C = CRC/FCS 23 data bytes 23 data bytes 23 dat...

Ngày tải lên: 14/08/2014, 13:20

... 0 0101 101 s 100 10011 S 1101 0011 ACK 0 0101 110 t 100 1 0100 T 1101 0100 NAK 0011 1101 u 100 1 0101 U 1101 0101 DLE 00 0100 00 v 100 10 110 V 1101 0 110 ETB 0 0100 110 w 100 10111 W 1101 0111 x 100 1100 0 X 1101 1000 y 100 1100 1 ... 0 1101 00 f 1100 110 F 100 0 110 5 0 1101 01 g 1100 111 G 100 0111 6 0 1101 10 h 1101 000 H 100 1000 7 0 1101 11 i 1101 001 I 100 1001 8 01 1...

Ngày tải lên: 14/08/2014, 13:20

... Frame HEADER PREAMBLE (8 bytes): 0×AA-AA-AA-AA-AA-AA-AA-AB DESTINATION ADDRESS (6 bytes): If address is unicast, contains the hardware address of a specific station. If address is multicast, carries ... Ethernet Frame IEEE 802.3 MAC HEADER PREAMBLE (7 bytes): 0×AA-AA-AA-AA-AA-AA-AA START DELIMITER (1 byte): 0AB DESTINATION ADDRESS (2 or 6 bytes): If address is unicast, contains the hardware...

Ngày tải lên: 14/08/2014, 13:20

... 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). Datagram A protocol ... follows as a Token Ring MAC management frame or a Token Ring data frame. The address fields contain the hardware addresses of the destination and source. IEEE 802.5 LAN Token Rin...

Ngày tải lên: 14/08/2014, 13:20

... 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 data. Service access point A port ... observing traffic flow, the switch maps VLANs to ports to ensure an up -to- date database. Protocol data unit Data exchanged between peer layers in a protocol...

Ngày tải lên: 14/08/2014, 13:20

... 2004 004.6'2—dc22 2004053826 British Library Cataloguing in Publication Data Carne, E. Bryan (Edward Bryan), 1928– A professional’s guide to data communication in a TCP/IP world. —(Artech House telecommunications library) 1. ... an acronym for Internet Protocol; its major purpose is to make origina- tion and destination addresses available to guide data acr...

Ngày tải lên: 14/08/2014, 13:20