Interview Question

  A Server at a company called  NETWORKWALKS  is using TCP/IP protocol to connect to the Network & is running multiple applications. At which layer of OSI Model is this Server operating? This Server is operating at Application Layer of OSI Model   What are LLC and MAC sublayers? What are their functions? LLC & MAC Sublayers are the two sub-divisions of Data link layer (Layer 2) of the OSI model. 1.     Media Access Control (MAC)  sublayer controls device interaction 2.     Logical Link Control (LLC)  sublayer controls LLC sublayer deals with addressing and multiplexing   Which Layer is used to deal with mechanical and electrical specifications? Physical Layer is used to deal with mechanical and electrical specifications   What are the functions of LLC (Logical Link Control) Sub-Layer? LLC sublayer is primarily concerned with multiplexing protocols to be sent over MAC sublayer. LLC subla...

  What is TCP? Transmission Control Protocol is a connection-oriented protocol. This means that before any data transfer can take place, Certain Parameters has to be negotiated in order to establish the connection   What is TCP Three Way Handshake process? TCP Three Way Handshake process is used for a reliable connection. In this process, the transmitting network device first establishes a connection-oriented (reliable) session with its peer system which is called three-way handshake. Data is then transferred. When the Data transfer is finished, connection is terminated and virtual circuit is teared down.   What is window size in TCP three way handshake process (3WHS)? It is 16-bit window field which indicates the number of bytes a sender will send before receiving an acknowledgment from the receiver.   What are TCP Flags? TCP Flags are used to influence the flow of data across a TCP connection. Below are TCP Flags: 1.     PUSH (P...