layer 2 tunneling protocol

Transport layer: TCP protocol One, overviewTCP and UDP are on the same tier-transport layer, but they are a lot different. TCP is the most complex part of the TCP/IP family protocol, which has the following characteristics: (1) TCP provides reliable data transfer services, TCP is connection-oriented . Before t

which frames sent by different hosts or devices may conflict with each other. A collection of All workstations on a wire, a collection of all nodes on a physical network segment, or a collection of nodes that compete for the same bandwidth over Ethernet is a conflict domain. When a conflict occurs, the transmitted frames may be damaged or disturbed. hosts that conflict will stop sending subsequent frames within a random period of time according to the CSMA/CD rules of 802.3 Ethernet. The disadv

Directory Header FormatData UnitSpecificNote:Automatic retransmission request ARQImplementationSending CacheReceive CacheSliding WindowConfirm lost and confirm lateTimeout retransmission time SelectionMessage segment sending timeTransportation connectionSend TCP request ClientConcepts related to congestion handlingAvoid congestionFinite State Machine of TCP Header Format Illustration: Description of fields: Source Port and destination port: Each occupies

Software download for analysis: Wireshark-win32-1.10.2.exeRead the guided Tour1. Analysis of application TCP protocol, and TCP link management2. Analyzing Application UDP protocolAnalysis requirements(1) TCP section: Learn the configuration and use of 3CDaemon FTP server Design applications to obtain TCP messages Analyze the format and content of TCP messages (analyze at least 5 messages and understand the relationship between them)

) below: Figure 1 Cisco Discovery Protocol Run the "show CDP neighbors" command to display the table of connected devices. Run "show CDP neighbors details" to expand the table and view the detailed connection information between vswitches (a VLAN matching error exists, right ?), And the detailed information of each device, including its management IP address information. Figure 2 Now everything goes w

After the skb_buff data packet is transferred from the IP layer to the link layer, the link layer starts to process the data packet. First, check whether the skb_buff data packet is not in the skb_buff linked list. If the data packet is still in (that is, skb_buff-> next! = NULL), it indicates that there is a problem with the above processing, the code should be

When talking about protocols, many people always think about networks and computers first. Indeed, computers and networks are large users of Protocols. However, with the constant development of electronic technology, more and more fields are beginning to use electronic devices that are almost as intelligent as computers, which also involve Protocol issues. Now we will introduce the CAN bus protocol. CAN bus

Analysis of Layer 2 (Link Layer) packet sending ProcessAnalysis of L2 (Link Layer) packet sending process -- lvyilong316 Note: The kernel version involved in this series of blog posts is 2.6.32.After a packet is prepared on the upper layer, the packet is sent to the link

serial line, which is described in RFC 1055 [Romkey 1988. S l I p is applicable to the r s-2 3 3 2 serial port and high-speed modem access I n t e r n e t that almost all computers in the home.The following rules describe the frame format defined by the s l I P protocol:1) IP data is reported to end with a special character called e n d (0 x c 0. In addition, to

comprehensive evaluation of 24 fully-gigabit switches. During the overall assessment, the weight is: performance accounts for 60%, functionality accounts for 30%, and price accounts for 10%. Currently, 24-port full-gigabit switches with fixed configurations are divided into two categories: Pure Layer 2 and Layer 3. Alcatel OmniStack 6300-24 has outstanding perfo

Port =61226Revemsg = hello! I ' M Client1; Remote Port =61226Revemsg = hello! I ' M Client2; Remote Port =61226Revemsg = hello! I ' M Client3; Remote Port =61226Revemsg = hello! I ' M Client4; Remote Port =61226UDP Transport Layer protocol:(1) UDP is a non-connected service, which is the initial handshake phase when no pipelines are created between two processes.(2