A Professional’s Guide to Data Communication in a TCP/IP World phần 5 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

... shows a token and the fields in a frame containing an IP datagram. The frame consists of an IEEE 802 .5 header, an IEEE 802.2 LLC header, an IEEE 802.3 SNAP header, the payload (IP datagram), and an ... IP datagram contains the sequence 0×7D–5E, it is replaced by 0×7D–5D–5E. In addition, a combination of character stuffing and bit stuffing is used to pre - vent characters in an...

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 cells 53 ... datagram Packet X. 25- 3 Data 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 Hea...

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

... Unfortu - 152 The Convergence of Voice and Data Transporting the caller’s voice and the response of the called party between originating and terminating terminals is straightforward. Setting up and managing the ... For instance, in an Ethernet local area network, the letter a, which, in ASCII is MSB 1100001 LSB will be read into the data stream as ⇐1000011 In a Token Ring local...

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 ... Code indicating upper layer protocol contained in frame. For IP datagram set to 0×08-00; for ARP set to 0×08-06. PAYLOAD IP DATAGRAM (46 to 1 ,50 0 bytes): Contains Internet layer he...

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 R...

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 ... Performance Engineering, Robert G. Cole and Ravi Ramaswamy Winning Telco Customers Using Marketing Databases, Rob Mattison WLANs and WPANs towards 4G Wireless, Ramjee Prasad and...

Ngày tải lên: 14/08/2014, 13:20

... purpose is to make origina- tion and destination addresses available to guide data across networks. IP includes several management protocols that are essential to the operation of the Internet. Together, ... Point -to- Point Protocol (PPP) Frame 189 B.3.2 X. 25 Data Frame 189 B.3.3 ATM Cell Structure 190 B.3.4 AAL5 Frame Containing IP Datagram 190 B.3 .5 Frame Relay Frame with 2...

Ngày tải lên: 14/08/2014, 13:20