computer networking a topdown approach featuring the internet second edition

Ngày tải lên: 28/02/2015, 19:04

Ngày tải lên: 28/02/2015, 18:16

... channel ❍ receiver read data from underlying channel Wait for call from above packet = make_pkt(data) udt_send(packet) rdt_send(data) extract (packet,data) deliver_data(data) Wait for call from below rdt_rcv(packet) sender receiver ... TCP and UDP application transport network data link physical application transport network data link physical network data link physical network data link physical network data link physical network data ... link physical application transport network data link physical network data link physical network data link physical network data link physical network data link physical network data link physical l o g i c a l ...

Ngày tải lên: 27/06/2014, 16:20

... stored audio and video 2) Streaming live audio and video 3) Real-time interactive audio and video Jitter is the variability of packet delays within the same packet stream 7: Multimedia Networking ... is a positive constant. Remaining packets in talkspurt are played out periodically 7: Multimedia Networking 7-5 MM Networking Applications Fundamental characteristics: ❒ Typically delay ... resolution audio stream as the redundant information ã for example, nominal stream PCM at 64 kbps and redundant stream GSM at 13 kbps. ã Whenever there is non-consecutive loss, the receiver can conceal...

Ngày tải lên: 27/06/2014, 16:20

... management agent data agent data agent data agent data managed device managed device managed device managed device managing entity data network management protocol definitions: managed devices contain managed objects ... whose data is gathered into a Management Information Base (MIB) managing entity Network Management 9- 15 SNMP protocol Two ways to convey MIB info, commands: agent data Managed device managing entity response agent data Managed ... management? ❒ Internet- standard management framework ❍ Structure of Management Information: SMI ❍ Management Information Base: MIB ❍ SNMP Protocol Operations and Transport Mappings ❍ Security and Administration ❒ ASN.1 ...

Ngày tải lên: 27/06/2014, 16:20

... by paying more a state of affairs that some (particularly Americans!) find odd. We'll take a look at state-of -the art Internet research that is aimed at changing this situation in Chapter ... packets. In Figure 1.4-6, the first packet has arrived at the destination, the second and third packets are in transit in the network, and the last two packets are still in the source. Again, ... Daytona Beach another gas station attendant also extracts the Orlando portion of the address and tells Joe that he should take I-4 directly to Orlando. Joe takes I-4 and gets off at the Orlando...

Ngày tải lên: 14/08/2014, 13:21

... proach%2 0Featuring% 2 0the% 2 0Internet/ protocol_stacks.htm (6 of 7)20/11/2004 15:51:44 ATMover (AAL), the ATM Layer, and the ATM Physical Layer: ATM Adaptation Layer (AAL) ATM Layer ATM Physical Layer ... i.e., no data loss. In particular, a loss of file data, or data in a financial transaction, can have devastating consequences (in the latter case, for either the bank or the customer!). Other loss ... interface, AAL5 prepares IP datagrams for ATM transport; at the ATM-to-IP interface, AAL5 reassembles ATM cells into IP datagrams. Figure 1.10-2 shows the protocol stack for the regions of the Internet...

Ngày tải lên: 14/08/2014, 13:21

... is almost identical to TCPServer.java. As with TCPServer.java, we import the java.io and java.net packages. In addition to these two packages we also import the java.util package, which contains ... of the data. These retransmissions are completely transparent to the application programs. The DNS lookup is also transparent to the application programs. To test the program pair, you install ... of the socket, there is a taxi waiting for the packet. The taxi then drives the packet in the direction of the packet's destination address. However, the taxi does not guarantee that it...

Ngày tải lên: 14/08/2014, 13:21

Ngày tải lên: 14/08/2014, 13:21

Ngày tải lên: 14/08/2014, 13:21

Ngày tải lên: 14/08/2014, 13:21

Ngày tải lên: 14/08/2014, 13:21

Ngày tải lên: 14/08/2014, 13:22

Ngày tải lên: 14/08/2014, 13:22