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so that the other sites on the line can detect the conflict as early as possible.4. After the terminal device detects a conflict, it waits for a period of time before the data is sent (the delay time is determined by the Backoff algorithm).CSMA/CD's working principle can be summed up as follows: First listen to the post, the side of the hair and listen, the conflict stopped, random delay after the re-hair.Physical layer devices: repeaters and hubsData Link LayerThe data link layer is divided in

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because it is occupied by modem). The subnet mask is 255.255.255.0 and the gateway is 192.168.1.1. After completing the above work, we will start to configure ADSL modom. Open IE, enter 192.168.1.1 in the address bar, and press enter to display the user login page. In the "user name" and "password" columns, you can log on to the vro management interface after the user name and password of the modem are respectively entered.Open the web page and click "ATM setting" to change the operate mode to

GPRS work, is through routing management to address and establish data connection, and GPRS routing management performance in the following 3 aspects: (1) The routing of data sent by mobile terminals is established. (2). The route of the mobile terminal receiving data is established; (3) and the establishment of the data route when the mobile terminal is roaming. For the first case, when the mobile terminal produces a PDU (packet data unit), the PDU is processed by the SNDC layer, called the

{Pause-frame, non-pause-frame}: non-pause-frame [Note]: It is recommended that the uplink Ethernet port be set to m full duplex without self-negotiation, and the working mode of the corresponding port of the Peer device be set to m full duplex. DYTELE_5100 (config) # pvc nms; Added Network Management pvc {Ipoa, 1483b}: 1483b; select 1483B. {Llc, vc}: llc; select the

also contains the protocol for controlling the Logical Link (LLC sub-layer), which describes the protocol for identifying the network layer and then encapsulating them. The LLC header tells the data link layer what data packets should be processed once a frame is received. The LLC sub-layer can also provide traffic control and control the sorting of bit streams.

At present, GPRS routing is widely used and promotes the development of wireless routing. So I have studied the knowledge about GPRS Routing Management and will share it with you here. GPRS route management refers to how the GPRS network can address and establish a data transmission route. GPRS route management is manifested in the following three aspects: the establishment of GPRS route for transmitting data from the Mobile Station, the establishment of route for receiving data from the mobile

able to detect conflicts at any time. In the event of a conflict, the transmission should be stopped to avoid wasted media bandwidth due to invalid frames transmitted. Then, after a random delay for a period of time, resend the media and resend the frame. At first, three companies, Inter, Xerox and DEC, proposed the Ethernet standard. Later, the IEEE organization formulated the 802.3 standard, which stipulated the MAC Sub-layer of the Ethernet physical layer and the data link layer, it mainly d

at the same time. This registration primitive is converted into a declaration primitive by GIP and passed to the GID of other ports, under the specified GIP context, if the port status is forwarding, GID requests the MAC service and sends the declared garp pdu from the port. If it is in another status (for example, the status of the RSTP port is block or disable), it is not sent. Other switches and Endpoint devices perform the same registration and propagation after receiving the transmitted GA

Logical Link Control (LLC ). MAC describes how to schedule, generate, and receive data on a site in a shared media environment. MAC ensures reliable cross-link information transmission, synchronizes data transmission, identifies errors, and controls data flow. Generally, MAC is only important in the shared media environment. Only nodes in the shared media environment can be connected to the same transmission media. The ieee mac rule defines an addres

is idle. At this time, if two or more nodes listen to the idle media and send frames at the same time, a conflict will occur. This will make all the sent frames invalid, and the sending will fail immediately. Each node must be able to detect conflicts at any time. In the event of a conflict, the transmission should be stopped to avoid wasted media bandwidth due to invalid frames transmitted. Then, after a random delay for a period of time, resend the media and resend the frame. At first, three

image is 512 rows in the center of the two consecutive even images, in addition, the image blocks in the middle of each line contain 512 pixels. Using the synchronous signal of saa7113, the frame image is written into the Controller Module to generate the address signal, write signal, and one of the frame Switching signals (rdy1) of the frame memory ). The synchronous signals output by saa7113 include LLC, rts0, and rts1.