A Professional’s Guide to Data Communication in a TCP/IP World phần 4 ppsx

... 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

... accommodated, and a header and trailer are constructed. Added to the IP datagram, they form the IP frame. ã In the physical sublayer the logical data stream is converted to a signal stream to match ... modem mediated analog telephone lines), so that a flag character or an escape character within the IP datagram payload shall not inter- rupt transmission, PPP employs character...

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 ... IPdatagram AAL type Bit rate Connection mode 12 3 /4 5 Con- stant Variable CO CO CL CO Voice Video Data IPdgm Application ATM network interface layer ATM adaptation layer parameters Fi...

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 ... The transport overhead contains data that monitors and manages the optical line between the originating and terminating SONET multiplexers. Payloads that or...

Ngày tải lên: 14/08/2014, 13:20

... 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 call requires a ... Control Point (IN) SS7 Signaling System #7 STP Signal Transfer Point Analog signal associated in- band signaling (DTMF) TDM signal associated common channel signaling Inter-office disassocia...

Ngày tải lên: 14/08/2014, 13:20

... Frame HEADER PREAMBLE (8 bytes): 0ìAA-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 ... standard PAYLOAD: IP Datagram IEEE 80 2.5 TRAILER: standard B.4.2 Tag for IEEE 80 2.3 (Ethernet) Frame Encapsulating an IP Datagram IEEE 80 2.3 MAC HEADER: standard IEEE 80 2.2 LLC HEAD...

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

... 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 IPv6 Header 18 3 B .1. 5 ICMP Frame 18 3 B .1. 6 Echo Request and Reply Messages 18 4 B .1. 7 Destination Unreachable Message ... 16 8 A. 4 .1 Signal Classification 16 9 A. 4.2 Baseband Signal Formats 17 0 x Contents TLFeBOOK A Professional’s Guide to Data Communication in...

Ngày tải lên: 14/08/2014, 13:20

... 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 ... that supported many terminals (often characterized as dumb terminals). Server: A data processing device that stores data, organizes and maintains databases, and delivers...

Ngày tải lên: 14/08/2014, 13:20

... Figure 3. 13 shows an FDDI frame that encapsulates an IP datagram. Intentionally, it is very similar to frames for IEEE 802 .3 and IEEE 802.5. Like them, when transporting IP datagrams and ARP messages, ... modem mediated analog telephone lines), so that a flag character or an escape character within the IP datagram payload shall not inter- rupt transmission, PPP employs characte...

Ngày tải lên: 14/08/2014, 13:20

... 802.3 Token Ring FDDI Preamble Variable 0ìAA-AA -A A-AA-AA -A A-AA-AB 0ìAA-AA-AA-AA- AA-AA-AA-AA No 0ìAA-AA MAC Header Starting delimiter 1 byte No 0ìAB JK JK Access control 1 byte No No Yes No Frame ... over link AG. Because frame 3 takes the path AGC, and frames 1 and 2 take the path AEFGC, frame 3 arrives at C ahead of frames 1 and 2. 4. 2 Nonbroadcast Multiple Access Links 67 321 6 54...

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 ... and wrapped (encapsulated) in a second IP datagram. I will call this datagram D[D(1)]2 to symbolize an encrypted IP datagram [D(1)] encapsulated by a second datagram D(2). D(2) c...

Ngày tải lên: 14/08/2014, 13:20

... The transport overhead contains data that monitors and manages the optical line between the originating and terminating SONET multiplexers. Payloads that originate from the T-carrier family consist ... contains data that monitors and manages the electrical and optical connections between originat- ing and terminating multiplexers. To the SPE are added 27 bytes of transport overhead to...

Ngày tải lên: 14/08/2014, 13:20