Jawaban IT Essentials II Module 4 (v 3.0)

Module 4


1
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

2
What is the range of numbers in the first octet of a Class C address?
1-127
192-223
128-191
224-255
3
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
4
Which protocol is used to translate a domain name into an IP address?
ARP
DNS
UDP
NetBIOS
5
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
6
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

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
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
9
Which utility is used in Windows and Linux to view network connections and protocol
statistics?
arp
netstat
nbstat
ipconfig
10
What is a unique characteristic of the IP addressing scheme?
flat addressing
hierarchical addressing
internetwork addressing
single-octet addressing
11
In which layer of the TCP/IP model does ICMP operate?
Application
Transport
Internet
Network Access
12
Which address class contains the IP address 168.12.0.0?
A
B
C
D

13
How many octets are contained in an IP address?
1
2
4
8
14
Which Linux command is used to temporarily change the default gateway of a host?
arp
ifconfig
netstat
route
ping
15
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 rout e through a network
16
Which service is used to enable individual computers to automatically obtain an IP
address?
WINS
DNS
ARP
DHCP
17
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.
18
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

19
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
20
The performance of a network has dropped. Which command should an administrator
use in a Linux system to determine which routers a re causing the problem?
ping
traceroute
tracert
route
ifconfig

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