Midterm 2

Question 1

Associated with CSMA/CD

Answer 1

Ethernet

Question 2

Assigns IP addresses to computers

Answer 2

DHCP

Question 3

Always floods received “messages” out all ports

Answer 3

hub

Question 4

The exit point where all packets leaving a compuer are sent

Answer 4

default gateway

Question 5

128 bits in length

Answer 5

IPng

Question 6

IP Tunnelling

Answer 6

Encapsulating IPv6 datagrams within IPv4 datagram

Question 7

10101100 in decimal

Answer 7

172

Question 8

01000011in decimal

Answer 8

67

Question 9

133 in decimal

Answer 9

10000101

Question 10

In computer networks, a type of message sent to a group of (not all) nodes at the same time is called

Answer 10

multicast

Question 11

Which protocol is used to access a file shared on a Windows network directory [acronym only]

Answer 11

SMB

Question 12

Physical access in Networking

Answer 12

• Server rooms should be well cooled and have redundant source of power.
• Where possible remove keyboards, mice, and screens/monitors from server rooms. Instead use remote access or KVM switches.
• Disable ports on devices, e.g., USB ports or CD/DVD drives
• Similar processes should be applied for active devices.

Question 13

Ping uses Answer ____ Echo packets to request a response from another computer to verify whether it’s available for communication

Answer 13

ICMP

Question 14

What is the subnet mask of a class B address with prefix /15.

Answer 14

255.254.0.0

Question 15

A network administrator subnets a 192.168.10.0 private address using a /27 prefix. What are 3 valid address blocks within the newly formed subnetworks?

Answer 15

192.168.10.1 - 192.168.10.31,

192.168.10.97 - 192.168.10.127,

192.168.10.33 - 192.168.10.63

Question 16

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

Answer 16

APIPA

Question 17

resolves an IP address to a MAC address

Answer 17

ARP

Question 18

resolves names to IP addresses

Answer 18

DNS

Question 19

dynamically assigns IP addresses

Answer 19

DNS

Question 20

the unit of information used by UDP in the Transport layer

Answer 20

datagram

Question 21

Transport layer protocol that is connection-oriented and reliable

Answer 21

TCP

Question 22

What type of packets are transmitted between a DHCP client and server when the client is initially leasing an IP address

Answer 22

Broadcast

Question 23

Two common tools for diagnosing network connectivity which run on the ICMP protocol are

Answer 23

PING
TRACERT

Question 24

Network security measures include

Answer 24

MAC Address Filtering,

Keeping ingress and egress logs,

Use of multi-factor authentication

Question 25

Which of these messages helps TCP determine if a packet has been duplicated or lost

Answer 25

ACK

Question 26

Where of these protocols are associated with emails

Answer 26

POP3,

SMTP,

IMAP4

Question 27

time taken to examine a packet’s header and determine the exit interface

Answer 27

→ processing delay

Question 28

the time required to “load” packets onto a communication medium/channel

Answer 28

→ transmission delay

Question 29

the time a packet spends in a router waiting to be processed

Answer 29

→ queueing delay

Question 30

time taken to transmit a packet across a communication channel or medium

Answer 30

→ propagation delay

Question 31

A document that spells out the regulations governing access and use of network resources within an institution is called

Answer 31

Network Security Policy