T/F Exam questions

Question 1

00110001 is the binary version of the decimal number 49

Answer 1

True

Question 2

2001:0000:35d0:0000:56:abed:e930:001 can be represented as 2001::35d::56:abed:e93:1

Answer 2

False

Question 3

unicase is not supported by IPv6

Answer 3

False

Question 4

in IPv4, the address 127.0.0.1 represents a loopback address.

Answer 4

True

Question 5

255.255.255.160 is a valid subnet mask for a sub-network

Answer 5

False

Question 6

In an IP network, each router is given only one unique IP address so packets can be properly routed

Answer 6

False

Question 7

A routing table contains many routes where each route represents a device’s IP address

Answer 7

False

Question 8

Broadcasting is allowed only in IPv4 and not allowed in IPv6

Answer 8

True

Question 9

IPv6 no longer supports the ability to fragment packets

Answer 9

True

Question 10

192.168.255.254 is an invalid private IP address

Answer 10

True

Question 11

10.0.0.0/8 is a class A private network

Answer 11

True

Question 12

192.168.100.192/26 is a network ID assigned to a host

Answer 12

True

Question 13

Broadcasting IPs have all 1s in the fourth octet

Answer 13

False

Question 14

\31 is the minimum subnet that can support only two devices because its host bit is 1 and 2^1=2

Answer 14

False

Question 15

Http is a layer-3 protocol while TCP is a layer-4 protocol

Answer 15

False

Question 16

CSMA/CA is a protocol used in wired Ethernet communication

Answer 16

False

Question 17

A single-mode fiber optic cabling only allows an individual light path through it

Answer 17

True

Question 18

STP is a built-in feature of a switch, which is used to avoid the broadcast storm

Answer 18

True

Question 19

IGMP Protocol is used by the ping command

Answer 19

False

Question 20

In an IP packet there are a few reserved bits to indicate the length of this IP packet

Answer 20

True

Question 21

A bluetooth network allows wireless communication for short distances

Answer 21

True

Question 22

In copper or fiber, the speed slows to about 2/3 of light speed, and becomes frequency dependent

Answer 22

True

Question 23

Port numbers less than 1024 are well-known ports for existing services/protocols such as telnet, ftp, dns, etc

Answer 23

True

Question 24

The unix traceroute command is ued to determine the mac address of a remote machine

Answer 24

False

Question 25

Auto MDI-X can automatically switch to the proper configuration once a cable is connected

Answer 25

True

Question 26

The data rates of USB 2.0 and USB 3.0 are about 10 times different

Answer 26

True

Question 27

Rj-11 is a 4-pin connector used on most home telephone network

Answer 27

True

Question 28

In a vacuum, all electro-magnetic waves travel at same speed, no matter frequency

Answer 28

True

Question 29

Global Positioning System (GPS) is a popular application that uses fiber optics technology

Answer 29

False

Question 30

TTL used 8 bits in an IP header to count the routing hops

Answer 30

True