Friday, February 10, 2012

NETWORKING chapter 5

SG Network Protocols
Chapter 5

TRUE/FALSE

     1.   IPX/SPX is considered the protocol suite of the Internet, and it is the most widely used protocol suite in LANs.

     2.   The Internetwork layer is the layer that handles network configuration and is considered the heart of the TCP/IP protocol suite.

     3.   The Transport layer uses port numbers to identify the source and destination Application-layer protocol of the data that it contains.

     4.   DNS is a protocol that automatically provides a computer with its IP address configuration.

     5.   An IP address is composed of 48 bits that are grouped together into 8-bit octets and are represented by a decimal number from 0 to 255.

MULTIPLE CHOICE

     1.   The Transport layer deals with which unit of information?

a.
frame
b.
packet
c.
signal
d.
segment


     2.   Which of the following is not a function of the Network Access layer?

a.
transmits and receives bit signals
b.
delivers packets efficiently
c.
provides a MAC address for the network interface
d.
receives packets form the Internetwork layer and creates the frame


     3.   In what layer does the NIC operate?

a.
Network Access
b.
Internetwork
c.
Transport
d.
Application


     4.   In which layer does a router operate?

a.
Network Access
b.
Internetwork
c.
Transport
d.
Application


     5.   Which protocol is responsible for determining the MAC address associated with each IP address and keeping a table of its results?

a.
MAC
b.
DNS
c.
ARP
d.
NAT


     6.   TCP establishes a connection with the destination device using which process?

a.
encapsulation
b.
flow control
c.
windowing
d.
three-way handshake


     7.   Which of the following is not an Application layer protocol?

a.
DNS
b.
TCP
c.
DHCP
d.
SMTP


     8.   An IP address consists of four octets separated by periods. Which part of this address denotes its class?

a.
first octet
b.
second octet
c.
third octet
d.
fourth octet


     9.   How many host addresses are available on a Class C network?

a.
254
b.
256
c.
65534
d.
65536


   10.   You are the network administrator for a company that uses a private addressing scheme for its internal network. You have 300 workstations that regularly access the Internet. What process must be in operation on your network to allow all the workstations to have access to the Internet using only one public IP address?

a.
DHCP
b.
DNS
c.
ARP
d.
PAT


   11.   What is the binary number system based on?

a.
powers of 2
b.
powers of 4
c.
powers of 10
d.
powers of 16


   12.   Which part of a computer’s IP address configuration indicates the portion of the address that specifies the network ID?

a.
IP address
b.
subnet mask
c.
default gateway
d.
MAC address


   13.   What is the decimal equivalent to the binary number 11000001?

a.
97
b.
160
c.
161
d.
193


   14.   How many bits are in an IPv6 address?

a.
32
b.
48
c.
64
d.
128


   15.   The last 64 bits of an IPv6 address are the interface identifier. Where is that number derived from?
a.
via DHCP
b.
a static entry
c.
from an ISP
d.
the MAC address


   16.   What is the hexadecimal number F equal to in binary?

a.
0011
b.
1011
c.
1001
d.
1111


   17.   What is the decimal equivalent to the hexadecimal number D?
a.
13
b.
15
c.
12
d.
10


   18.   How many bits are available in an IPv6 network for creating subnets when the prefix is /48 and the host ID is 64 bits?

a.
48
b.
16
c.
32
d.
64


MULTIPLE RESPONSE

     1.   Which of the following is a feature of TCP? (Choose all that apply.)

a.
segments data into chunks
b.
converts signals into bits
c.
provides data-formatting services
d.
ensures flow control
e.
establishes a connection


     2.   Which of the following are solutions to the shortage of available IPv4 addresses? (Choose all that apply.)

a.
IPv6
b.
private addressing
c.
subnetting
d.
supernetting
e.
NAT


COMPLETION

     1.   An IP address is composed of two parts, one is the ____________ ID and one is the host ID.

     2.   ____________are sets of rules and procedures that dictate communication and behavior.

     3.   ___________ is a way of breaking a large address space into more, smaller, address spaces.

     4.   The four layers of the TCP/IP protocol suite are Application, ____________, Internetwork, and Network Access.

     5.   An address that can only be used on the internal network and cannot be used to access the Internet is called a ____________ address.

MATCHING


a.
ARP
b.
APIPA
c.
CIDR
d.
DNS
e.
DHCP
f.
IMAP
g.
NAT
h.
POP3
i.
TCP
j.
UDP


     1.   method of IP addressing that allows more efficient use of IP addresses

     2.   dynamically configures IP address

     3.   protocol in which e-mail is downloaded to the host computer

     4.   Transport layer protocol that is connectionless

     5.   translates private IP address to public IP address

     6.   resolves IP address to MAC address

     7.   Transport layer protocol that is connection-oriented and reliable

     8.   type of address that is automatically assigned when no DHCP server can be contacted

     9.   protocol in which only e-mail headers are downloaded to the host until the message is opened

   10.   resolves computer names to IP addresses

SHORT ANSWER

     1.   What are four tasks or responsibilities of the Internetwork layer?

     2.   Briefly describe ARP, include the meaning of its acronym and the layer in which it functions.

     3.   Explain how Tracert uses an ICMP packet and the TTL value to map the path to an IP address.

     4.   How does TCP provide flow control and reliability?

     5.   Briefly describe the three-way handshake that TCP uses to establish a connection.

     6.   What does APIPA stand for, and what does it do?

     7.   What is the function of DNS, and at which layer does it operate?

     8.   Briefly describe an IP address.

     9.   A range of addresses is reserved for private addressing in each class. What are those ranges?

   10.   What is the difference between TCP and UDP?

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