UNIT 9. Intermediate TCP/IP

Transcription

1 9 ntermediate P/P

2 Packet Header Protocol field maps layer 3 to layer 4

3 P DP Headers

4 Delivery ervices Guaranteed delivery (P) Delivery with bounded delay guaranteed within a specific time period n order delivery inimum bandwidth aximum jitter packet spacing guarantee Best ffort will try and deliver all the packets eventually frequently referred to a guarantee of no service ote: transport layer connection services are router to router. etwork connections are host to host

5 Datagrams Datagram connectionless service at the network layer Put the correct addresses in the packet tick it on the proper outgoing port hen forget about it

6 P Datagram Format

7 liding Window Flow ontrol he amount of data that the receiving computer can receive without over flowing its message buffers Determines the speed of the data transmission used by the sender Will be increased or decreased depending on how fast the receiver can process the data

8 Withholding cknowledgements he receiver does not send an acknowledgement until it is able to store and process the data nly works in a positive acknowledgement e (K) system an not work in a negative acknowledgement (K) system

9 P onnection etup

10 P onnection ear Down

11 Denial of ervice (Do)

12 P equence umber Reliability

13 P egmentation

14 Ports ockets port is a 6-bit P connection number socket is a port and the P (or other protocol) address of the end system needed to form a complete path to the data You can create a private web site by changing the port number for the web service on the server and in the services file for both the client and server Well known ports are 0 to 023 Registered ports are 025 to 49,5 Dynamic ports are 49,5 to 65,535

15 ommon Well Known Ports HP 80 FP 2 GPHR 70 P 25 elnet 23 D 53 Bootp 67 PP3 0 P4 34

16 thernet hannel ccess ethod ypically implemented in bus or star topology ses the /D (arrier ense ultiple ccess with ollision Detection) a contention based network communication access method used by ntel lpha computers / (arrier ense ultiple ccess with ollision avoidance - contention based network communication access method used by pple computers

17 Frame Relay Packet switching broadband network designed as an update to X.25 Designed with the assumption that communication channels would be reliable so there is no guarantee of data integrity Works at both layer and 2 of the model ses bandwidth on demand to accommodate bursty traffic onnects through a frame relay interface (FR)which is usually incorporated into a router

18 (synchronous ransfer ode) was designed with audio and video streaming in mind that requires that packets arrive synchronized in real-time Packet switching network using a packet of a 53 byte fixed length Reaches data rates of bps protocol data unit (PD) = cell nter-operates with other network types Works at layer, 2 3 of the model

19 ayer roubleshooting able Problems Broken Disconnected ncorrect Bad connection Bad ransceivers lock rate settings on serial cables ncorrect duplex settings Devices turned off or unplugged ncorrect protocol configuration

20 ayer 2 roubleshooting ncorrect serial interface configuration ncorrect thernet configuration ncorrect encapsulation configuration

21 ayer 3 roubleshooting o routing protocol Routing protocol not configured on all interfaces Routing protocol not enabled ncorrect static routes ncorrect protocol configured Wrong P addresses ncorrect subnet masks ncorrect gateway configured

22 ink tatus

23 roubleshooting ommands ping traceroutet show interfaces show ip int brief show DP neighbors show ip route show ip protocols Debug telnet