Chapter 5
Network and Transport Layers
True-False Questions
The following are possible True/False questions for tests. The statement is given and the answer
is provided . The level of difficulty (easy, medium, hard) and the page number(s) relevant to the
topic are also furnished.
1.
TCP/IP is a data link protocol that is used on the Internet.
2.
The network layer sits directly between the application layer and the data link layer in the
Internet five-layer network model.
3.
The network layer is responsible for end-to-end delivery of the message.
4.
The transport layer routes messages thought the network selecting the best path from the
source to the destination station.
5.
The transport layer process running on the destination computer, reassembles the fragmented
application message before passing it up to the application layer
6.
TCP is the network layer protocol used on the Internet today.
7.
IP is responsible for error-free delivery of packets on a TCP/IP network.
8.
The TCP portion of TCP/IP performs linking to the application layer.
9.
The source port identifier in the TCP header tells the TCP software on the destination
computer, which application on the destination it should pass the packet to.
10.
TCP includes a sequence number so that the packets can be reassembled at the destination in
the correct order.
11.
The latest version of IP is IPv7, which increases the address space from 128 bits to 256 bits.
12.
To help determine to which application a transmission should be delivered on a particular
computer, TCP uses the application layer port addresses to distinguish among many open
applications on a computer
13.
Source port address is the logical address generated by the application layer on the source
computer to identify the application, which is sending the data.
14.
The standard port number for Telnet is 53.
15.
Because there is a limit on the length of a frame that the data link layer can transmit from
node to node, the transport layer breaks up the message from the application layer into
several smaller packets.
16.
Connectionless routing sets up a TCP connection, or virtual circuit between a sender and
receiver.
17.
TCP/IP operates only as connection-oriented.
18.
Quality of Service routing is a special type of connection-oriented routing in which different
connections are assigned different priorities.
19.
An example of an application layer address is www.indiana.edu
20.
The network layer address for IP is ten bytes long when using IPv4.
21.
The data link layer address is generally encoded in a network card by the card’s
manufacturer.
22.
IPv4 addresses offer unlimited opportunity for expansion and growth on the Internet.
23.
Subnet masks tell computers what part of an IP address is to be used to determine whether a
destination is in the same subnet or in a different subnet.
24.
The most common standard for dynamic addressing for TCP/IP networks is Dynamic Host
Control Protocol.
25.
Translating an application layer address to a network layer address and finally to a data link
layer address is called address resolution.
26.
Part of the function of address resolution is translating the application layer address of the
destination into a network layer address.
27.
Domain Name Servers provide the equivalent of directory assistance for application layer
addresses.
28.
An Address Resolution Protocol message is broadcast to all computers in a subnet to find the
data link layer address.
29.
Routing is the process of determining the path or route through the network that a particular
message will follow from the sender to the recipient.
30.
There are four fundamental approaches to routing: centralized, static routing, dynamic
routing, and monitor routing.
31.
When using dynamic routing, routing decisions are always made by a central host or server.
32.
A hop in a routing calculation is defined as one link or circuit.
33.
An autonomous system is a network operated by one organization.
34.
A routing protocol used inside an autonomous system is called an exterior routing protocol.
35.
Enhanced Interior Gateway Routing Protocol is a dynamic link state interior routing protocol
developed by Cisco.
36.
A multicast message can be used to send a message to a maximum of two other computers.
37. Connections on a router, to the Internet and other routers for example, are called
applications.
MULTIPLE CHOICE
The following are possible multiple-choice questions for tests. The question is posed and the
answer is provided under the choices. The level of difficulty (easy, medium, hard) and the page
number(s) relevant to the topic are also furnished.
1.
The ____________ layer links the application layer with the network layer is responsible for
end-to-end delivery of messages.
a. physical
b. transport
c. session
d. presentation
e. data link
2.
a. end-to-end delivery of the message
b. taking messages from the application layer
c. routing
d. breaking long messages into smaller packets
e. interfacing with the network layer
_______ is the dominant network protocol today.
__________ is not an important function of the transport layer.
3.
a. SDLC
b. SNA
c. IPX/SPX
d. TCP/IP
e. X.25
4.
Transmission Control Protocol/Internet Protocol was developed for ________ in 1974.
a. ARPANET
b. IBM
c. Hewlett-Packard
d. University of Minnesota
e. Xerox
5.
TCP/IP:
a. is the least commonly used network protocol for LANs because it cannot be
combined with Ethernet
b. performs packetizing, as well as routing and addressing functions
c. is not very efficient and is prone to errors
d. is compatible with only one type of data link protocol, SDLC
e. refers to Telephone Control Procedures/Inter-exchange Procedures
6.
A typical TCP packet has a _______ header of control information.
a. 32-bit
b. 64-bit
c. 160-bit
d. 192-bit
e. 32-byte
7.
The source destination port identifier tells the destination station _____________.
a. which computer sent the TCP packet.
b. which application layer program that the packet should be sent
c. which application layer process the packet is from.
d. the IP address of the source computer.
e. the IP address of the destination computer.
8.
TCP uses _____________ so that the destination station can reassemble the packets into the
correct order.
a. IP addresses
b. sequence numbers
c. port numbers
d. packet numbers
e. reassembly value
9.
The older version of IP has a ________ header of control information.
a. 128-bit
b. 192-bit
c. 1024-bit
d. 160-bit
e. 320-bit
10.
IP:
a. performs packetizing functions
b. does not have a header
c. is currently in use with only one packet form or structure
d. performs routing functions
e. performs error control functions
11.
The newer form of IP, version 6 (Ipv6):
a. Is running out of address space to support the growth of the Internet
b. has a 20 byte header
c. has an increased address size from 32 bits to 128 bits
d. does not include version number in its header
e. does not include hop limit in its header
12.
Assume that more than one application program is using the same communications line on a
particular computer. To be able to decide to which application program a message should be
delivered on this computer, TCP/IP relies on the:
a. data link layer address
b. port address
c. application layer address
d. network address
e. IP address
13.
The transport layer must break messages from the application layer into several _____ that
can be sent to the data link layer.
a. bits
b. bytes
c. frames
d. packets
e. strings
14.
The negotiation by the transport layer at the sender with the transport layer at the receiver to
determine what size packets should be set up is done via establishing a(n) ___________
between the sender and receiver.
a. network layer address resolution
b. one way handshake
c. SNA message
d. TCP connection
e. DNS server request
15.
A TCP connection is established in the ___________ routing method.
a. asynchronous
b. connection-oriented
c. frequency division
d. application net
e. connectionless
16.
_____________ routing is a method of routing in which each packet makes its own way
through the network.
a. Frequency division
b. Connection-oriented
c. PCMCIA
d. Connectionless
e. Application net
17.
Which of the following is not a protocol used at the application layer.
a. HTTP
b. SMTP
c. FTP
d. Telnet
e. UDP
management
18.
______________ routing is most commonly used when the application data or message can
fit into one single packet.
a. Frame-oriented
b. Connection-oriented
c. Connectionless
d. Physical-oriented
e. Byte-oriented
19.
UDP is not commonly used for:
a. network management control messages
b. RIP messages
c. DHCP addressing messages
d. HTTP requests
e. routing control messages
20.
With QoS routing different __________ are defined, each with different priorities.
a. classes of service
b. domain names
c. application layer addresses
d. data link layer addresses
e. classes of Internet addresses