I T 3 2 UNIT 9 W A N. Intermediate TCP/IP T E C H N O L O G Y DPW

Transcription

1 UI 9 Intermediate P/IP

2 Packet eader Protocol field maps layer to layer 4

3 P & UDP eaders

4 Delivery Services uaranteed delivery Delivery with bounded delay guaranteed within a specific time period In order delivery Minimum bandwidth Maximum 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 Stick it on the proper outgoing port hen forget about it

6 IP Datagram MU Format

7 Sliding indow Flow ontrol he amount of data that the receiving computer can receive without over flowing it message buffers Determines the speed of the data transmission used by the sender ill be increased or decreased depending on how fast the receive can process the data

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

9 P onnection Setup

10 P onnection ear Down

11 Denial of Service (DoS)

12 P Sequence umber Reliability

13 P Segmentation

14 Ports & Sockets port is a 16-bit P connection number socket is a port and the IP (or other protocol) address of the end system needed to form a complete path to the data ou 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 ell known ports are to 1 Registered ports are 15 to 49,151 Dynamic ports are 49,151 to 65, 55

15 ell Known Ports P 8 FP 1 PR 7 SMP 5 elnet DS 5 Bootp 67 PP 11 IMP4 14

16 thernet hannel ccess Method ypically implemented in bus or star topology Uses the SM/D (arrier Sense Multiple ccess with ollision Detection) - a contention based network communication access method used by Intel & lpha computers SM/ (arrier Sense Multiple 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.5 Designed with the assumption that communication channels would be reliable so there is no guarantee of data integrity orks at both layer 1 and of the SI model Uses bandwidth on demand to accommodate bursty traffic onnects through a frame relay interface (FRI)which is usually incorporated into a router FRD UI - 1 or equivalent Public Switched etwork PS I

18 M (synchronous ransfer Mode) M was designed with audio and video streaming in mind that require that packets arrive synchronized in real-time Packet switching network using packet of a 5 byte fixed length Reaches data rates of 155-6Mbps. M protocol data unit (PDU) = cell Inter-operates with other network types orks at layer 1, & of the SI model M Switch UI nd station I M Router M Switch UI I Public M etwork

19 ayer 1 roubleshooting able Problems Broken Disconnected Incorrect Bad connection Bad ransceivers lock rate settings on serial cables Incorrect duplex settings Devices turned off or unplugged Incorrect protocol configuration

20 ayer roubleshooting Incorrect serial interface configuration Incorrect thernet configuration Incorrect encapsulation configuration

21 ayer roubleshooting o routing protocol Routing protocol not configured on all interfaces Routing protocol not enabled Incorrect static routes Incorrect protocol configured rong IP addresses Incorrect subnet masks Incorrect gateway configured

22 ine Up Route Interface Status ine Protocol Up Interface orking Up Down dmin down Down Down Down ot working (usually software or data link layer problem) ot working (ususlly hardware or physical layer problem ot working because shut down

23 roubleshooting ommands Ping raceroute Show interfaces Show DP neighbors Show ip route Show ip protocols Debug telnet