From the course: Cisco CCNA (200-301) Cert Prep: 1 Network Fundamentals and Access

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TCP and UDP

TCP and UDP

From the course: Cisco CCNA (200-301) Cert Prep: 1 Network Fundamentals and Access

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TCP and UDP

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- [Instructor] TCP and UDP utilize the two connection types, connection oriented and connectionless. TCP is considered connection oriented. This means, it uses a system to provide reliable delivery of traffic. TCP utilizes a system known as three way handshake to establish connections. Before a connection is considered established, both hosts need to send and receive a SYN packet and an ACK packet. Technically, this could be four separate messages but one of these transmissions can include both a SYN and an ACK, thus we have a three way handshake. The client host will initiate the interaction to the server by sending a SYN Packet. The client then waits for a response. The server responds to the client by sending SYN ACK packet. The client then completes the handshake by returning an ACK. The ACK packet is part of the positive acknowledgment system of TCP. Once enough information is sent, TCP will wait for an ACK or acknowledgment. The amount of information that can be sent before a…

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