Correct Answer:
Explanation/Reference:
* (1) Application layer protocols include:
Remote login to hosts: Telnet
File transfer: File Transfer Protocol (FTP), Trivial File Transfer Protocol (TFTP)
Electronic mail transport: Simple Mail Transfer Protocol (SMTP)
NTP, Network Time Protocol
* (2) Session Layer
Session-layer services are commonly used in application environments that make use of remote procedure calls (RPCs).
NetBios is also a session layer protocol.
* (3) Network Layer
The network layer is responsible for packet forwarding including routing through intermediate routers.
Network Layer protocols include IPX (Internetwork Packet Exchange).
/ X.25 is one of the oldest packet-switched services available. It was developed before the OSI Reference Model. The protocol suite is designed as three conceptual layers, which correspond closely to the lower three layers of the seven-layer OSI model. It also supports functionality not found in the OSI network layer.
/ NetWare Link Services Protocol (NLSP) is a routing protocol for Internetwork Packet Exchange (IPX).
* (4) Data link layer
WAPs (Wireless access points) and wwitches operate on the data link layer.
* (5) Network layer
Network layer protocols include ICMP (Internet Control Message Protocol), RIP (Routing Information Protocol), and ARP (Address Resolution Protocol).
* (6) Data link layer
the data link layer is responsible for media access control, flow control and error checking.
Bridges and network cards are on the data link layer.
