NCTI 3 to 4 Exam Questions And Answers

The Open Systems Interconnection reference model (OSI/RM) Network Layer serves which primary purpose? - Answer It uses Layer 3 addresses to create multiple routed networks. The address 68.56.189.17 belongs to which Internet protocol (IP) class? - Answer Class A What happens to a datagram sent by a higher level protocol to a 127.x.y.z address? - Answer The datagram loops back inside the host and never leaves the network interface card (NIC). Which device evaluates and acts upon a packet's Internet protocol (IP) address? - Answer Router. The Network Layer must do what to a received frame first, in order to determine the route over which it will forward the datagram to the next network? - Answer Decapsulate the packet. What network information can be determined from a logical Internet protocol (IP) address? - Answer The host portion and network portion. The physical address of a device is processed by which layer of the Open Systems Interconnection reference model (OSI/RM)? - Answer The Data Link Layer. Which layer of the Open Systems Interconnection reference model (OSI/RM) would you suspect as being the problem when packets are arriving at the server but no information is being returned to the client? - Answer The Transport Layer. All computers running on the transmission control protocol/Internet protocol (TCP/IP) suite have which of the following in common? - Answer Each computer is assigned its own Internet protocol (IP) address. A repeater operates at which layer of the Open Systems Interconnection reference model (OSI/RM)? - Answer The Physical Layer. Which one of the following protocols allows email clients to download their messages from an email server? - Answer Post Office Protocol version 3 (POP3)