ITESS 2 CHAPTER 4

1
Which IP address range, as indicated by the first octet, is reserved for testing, and includes the loopback address?
> 127.x.x.x
168.x.x.x
255.x.x.x
192.x.x.x

2
Which service is used to enable individual computers to automatically obtain an IP address?
WINS
DNS
ARP
> DHCP

3
How many octets are contained in an IP address?
1
2
> 4
8

4
Which address class contains the IP address 168.12.0.0?
A
> B
C
D

5
Which Linux command is used to temporarily change the default gateway of a host?
arp
ifconfig
netstat
> route
ping

6
What is the range of numbers that can be used in the first octet of a Class A network?
> 1-126
128-191
192-223
1-255

7
Which of the following rely on ICMP?
> sending an Echo Request
logging in to a remote host
mapping an IP address to a MAC address
resolving a host name

8
In which layer of the TCP/IP model does ICMP operate?
Application
Transport
> Internet
Network Access

9
Which classes of IP addresses are used by commercial organizations for host addressing?
A,C,D
B,C,D
C,D,E
> A,B,C

10
The performance of a network has dropped. Which command should an administrator use in a Linux system to determine which routers are causing the problem?
ping
> traceroute
tracert
route
ifconfig

11
What is the primary function of NAT?
convert a MAC address to a domain name
> translate between a local IP address and a global IP address
allocate IP addresses to commercial organizations
determine the best route through a network

12
Which utility is used in Windows and Linux to view network connections and protocol statistics?
arp
> netstat
nbstat
ipconfig

13
What is the range of numbers in the first octet of a Class C address?
1-127
> 192-223
128-191
224-255

14
Which service does ARP provide?
It resolves a physical address to a TCP port number.
It resolves a broadcast address to an IP address.
> It resolves an IP address to a MAC address.
It resolves a URL to a MAC address.

15
Which protocol is used to translate a domain name into an IP address?
ARP
> DNS
UDP
NetBIOS

16
What is subnetting?
> dividing large networks into smaller ones using the same network number
allowing several small networks to communicate over the common carrier infrastructure
combining several networks into a single larger network
allowing separate companies to share an IP address by taking turns using it

17
A technician needs to log into a remote Linux PC to perform some maintenance. Which application layer protocol could be used?
> Telnet
FTP
HTTP
SNMP

18
What must a computer have when connected to a network?
one unique name per function
one unique address per service
> one unique address per connection point
one unique network

19
How would a technician permanently change the IP address of an Ethernet card on a Red Hat Linux PC to 192.168.34.4?
use the command ifconfig eth0 192.168.34.4
use the command route add default IP 192.168.34.4 dev eth0
use the command ping 192.168.34.4
> edit the IPADDRESS line in the file /etc/sysconfig/network-scripts/ifcfg-eth0

20
What is a unique characteristic of the IP addressing scheme?
flat addressing
> hierarchical addressing
internetwork addressing
single-octet addressing

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