The Bits and Bytes of Computer Networking: The Transport and Application Layers WK 3

The Bits and Bytes of Computer Networking: The Transport and Application Layers WK 3 What ordering of TCP flags makes up the Three -way Handshake? SYN, SYN/ACK, ACK; The computer that wants to establish a connection sends a packet with the SYN flag set. Then, the server responds with a packet with both the SYN and ACK flags set. Finally, the original computer sends a packet with just the ACK flag set . Transport layer protocols, like TCP and UDP, introduce the concept of a port. How many bits is a port fi eld? 16 bits; A TCP or UDP port is a 16 -bit number, meaning there are theoretically 65,535 possible values it can have. Please select all valid TCP control flags. WAIT, URG, ACK, LISTEN, RST, CLOSE RST, ACK, URG A device that blocks traffic that meets c ertain criteria is know as a ________. Firewall; A firewall is used to block certain defined types of traffic. Unlike our five -layer model, the OSI network model adds two more layers on top of the Application Layer. Select examples of these new layers bel ow. The presentation layer; The presentation layer might handle things like compression or encryption. the session layer; The session layer handles delivery of data from the transport layer to applications themselves. An example of something that operate s at the application layer is: a web browser; Web browsers and server operate at the application layer. What's the standard number for a TTL field? 64; While this value can be set to anything from 0 to 255, 64 is the recommended standard. Ports 1 -1023 ar e known as ______ ports. system; System ports are used for very well -known services. If the transmitting device would like for the receiving device to push currently buffered data to the application on the receiving end immediately, it would set the ____ flag. PSH; The PSH flag ensures that the receiving end doesn't wait for any further data.