PAPER WITH COMPLETE SOLUTIONS
●● 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 internal protocol
(IP) address?
Answer: Router
●● The network layer must do what to a recieved frame, 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 system interconnection reference modle
(OSI/RM) would you suspect as being the problem when packets
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 of the following protocols allows email clients to download
their messages from an email server?
Answer: Post office protocol version 3 (POP3)
, ●● Hypertext transfer protocol (HTTP) is what type of protocol?
Answer: Stateless
●● On the file transfer protocol (FTP) server, what manages client
requests for file retrieval or transmission?
Answer: A daemon
●● What are the primary requirements to connect a transmission control
protocol/ internet protocol (TCP/IP) network?
Answer: Unique pairs of network layer and transport layer addresses and
use of the TCP/IP protocol suit.
●● What type of delivery method uses an email server between the
sender and the receiver of messages?
Answer: Store-and-forward
●● Host names and uniform resource locators (URL) are resolved to
internet protocol (IP) addresses by which of the following?
Answer: Domain Name System (DNS)
●● What happens when the browser application finishes the
downloading the files necessary to display a web page?
Answer: The browser server drop the connections, and the browser
maintains th epage and its elements in local memory.