IT Ess 2 Modul 4

1 Which address class contains the IP address 168.12.0.0?

A
*B
C
D

2 Which Linux command is used to temporarily change the default gateway of a host?

arp
*ifconfig
netstat
route
ping

3 How many octets are contained in an IP address?

1
2
*4
8

4 What is the range of numbers in the first octet of a Class C address?

1-127
*192-223
128-191
224-255

5 Which service is used to enable individual computers to automatically obtain an IP address?

WINS
DNS
ARP
*DHCP

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 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

8 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

9 What is a unique characteristic of the IP addressing scheme?

flat addressing
hierarchical addressing
*internetwork addressing
single-octet addressing

10 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

11 In which layer of the TCP/IP model does ICMP operate?

Application
Transport
*Internet
Network Access

12 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

13 Which utility is used in Windows and Linux to view network connections and protocol statistics?

arp
*netstat
nbstat
ipconfig

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 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

16 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

17 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

18 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

19 Which protocol is used to translate a domain name into an IP address?

ARP
*DNS
UDP
NetBIOS

20 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

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