COMPUTER THREATS SECURITY
TYPES OF NETWORK SECURITY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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PSH
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FIN
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SYN
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URG
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Detailed explanation-1: -TCP uses a three-way handshake to establish a reliable connection. The connection is full duplex, and both sides synchronize (SYN) and acknowledge (ACK) each other. The exchange of these four flags is performed in three steps: SYN, SYN-ACK, ACK, as shown in Figure 5.8.
Detailed explanation-2: -SYN-The synchronization flag is used to establish a three-way handshake between two hosts. Only the first packet from both the sender and receiver should have this flag set.
Detailed explanation-3: -SYN packets are normally generated when a client attempts to start a TCP connection to a server, and the client and server exchange a series of messages, which normally runs like this: The client requests a connection by sending a SYN (synchronize) message to the server.
Detailed explanation-4: -TCP (Transmission Control Protocol) uses a three-way handshake (aka TCP-handshake, three message handshake, and/or SYN-SYN-ACK) to set up a TCP/IP connection over an IP based network.
Detailed explanation-5: -Establishing a connection the traditional way Here is a typical sequence, with the TCP flag SYN meaning “synchronize” and ACK indicating “acknowledgment”: The client sends a TCP packet to the server with the SYN flag set.