A network technician is addressing an issue where several applications periodically fail to establish network connections. Which mechanism, crucial for setting up reliable communications between devices, should be evaluated to ensure it is not at fault?
Window scaling
Checksum calculation
Keepalive messages
Three-way handshake
The three-way handshake is essential for establishing a reliable connection between a client and server. This process involves sending a SYN packet, receiving a SYN-ACK in response, and then sending an ACK. If any part of this handshake fails, the connection will not be established reliably, which could lead to the intermittent connection issues observed. The other options do not directly affect the fundamental establishment of connections. Window scaling impacts the flow control but not the initial connection establishment. Keepalive messages are used to maintain a connection but not in establishing one. Checksums ensure data integrity rather than connection reliability.
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