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EXAM 4: Previous Exam #3 (Chapter 7, 9, 10)
Exam 2's questions & answers
30
Computer Science
Graduate
12/16/2011

Additional Computer Science Flashcards

 


 

Cards

Term

A router is a network layer equipment.

 

True or False?

Definition
True
Term

A router must have at least 1 NIC card.

 

True or False?

Definition

False

 

A router must have at least 2 NIC cards.

Term

RIP is an example of interior gateway routing protocols; OSPF is an example of exterior gateway routing protocols.

 

True or False?

Definition

False,

 

RIP is a Distance-Vector Routing Protocol,

 

OSPF is an example of an interior gateway routing protocol. 

Term

Private IP addresses can be routed across the internet.

 

True or False?

Definition

False,

 

Private IP addresses need to be converted to public IP addresses before they can be routed across the internet. 

Term

PAT allows a single public IP address to be shared by a number of computers.

 

True or False?

Definition

True,

 

PAT (port address translation), don't know why though :-P

Term

In order for wireless devices to communicate with each other, a base station is required.

 

True or False?

Definition

False,

 

2 wireless devices can communicate via ad hoc, which does not require an AP or Base Station. 

Term

The 2 authentication methods defined in WEP are: Open System Authentication, and Shared Key Authentication. 

 

True or False?

Definition
True
Term

A wireless access point is a wireless router. 

 

True or False?

Definition

False,

 

A wireless access point can also be a bridge. 

Term

Which of the following IP addresses is a public address?

 

A) 10.10.10.2

 

B) 31.20.3.1

 

C) 172.25.10.1

 

D) 192.168.3.1

Definition

B,

 

31.20.3.1

 

Term

Given the following:

 

[image] 

 

Where would a packet with a destination address of 76.30.4.5 be sent?

 

A) To the default gateway on the interface WAN

 

B) To the 10.12.14.0/24 network on the interface LAN

 

C) To the 76.30.4.0/23 network on the interface WAN

 

D) Nowhere

Definition

C,

 

The keyword is, "where would a packet," meaning, "any" packet, be sent. Any packet (0.0.0.0) with any subnet mask (0.0.0.0) with a destination address of 76.30.4.5 will use the default gateway (which happens to be 76.30.4.(1, same subnet), on the WAN interface. 

Term

[image]

 

Given the above routing table, where would a packet with a destination address of 76.30.4.0 be sent?

 

A) To the default gateway on the interface WAN

 

B) To the 10.12.14.0/24 network on the interface LAN

 

C) To the 76.30.4.0/23 network on the interface WAN

 

D) Nowhere

Definition

A,

 

To the default gateway on the interface WAN

Term

When a router receives a data packet, it looks at ____ to make routing decisions.

 

A) The source MAC address in the packet header

 

B) The destination MAC address in the packet header

 

C) The source IP address in the packet header

 

D) The destination IP address in the packet header

Definition

D,

 

The destination IP address in the packet header

Term

The TRACEROUTE utility is used for ____.

 

A) Showing the physical locaiton of the route between you and the destination.

 

B) Discovering information about the routers between you and the destination

 

C) Configuring routers remotely

 

D) Fixing the computer's local routing table

Definition

B,

 

Discovering information about the routers between you and the destination

Term

Traceroute is based on which protocol

 

A) Ping

 

B) DNS

 

C) ICMP

 

D) WLAN

Definition

C,

 

ICMP

 

(Internet Control Message Protocol) 

Term

Which parameter uniquely identifies a wireless network?

 

A) Node ID

 

B) MAC address

 

C) SSID

 

D) Subnet mask

Definition

C,

 

SSID

 

(Service Set Identifier)

Term

Which of the following shows wireless encryption methods from the least secure to the most secure?

 

A) WEP, TKIP, AES

 

B) AES, TKIP, WEP

 

C) WEP, AES, TKIP

 

D) TKIP, AES, WEP

Definition

A,

 

WEP, TKIP, AES

Term

A wireless LAN refers to which of the following

 

A) 802.3

 

B) 802.11

 

C) 802.15

 

D) 802.16

Definition

B,

 

802.11 is the wireless standard

Term

The emerging standard for WPAN is the IEEE ____ standard.

 

A) 802.3

 

B) 802.5

 

C) 802.11

 

D) 802.15

Definition

D,

 

802.15 is the standard for WPAN

Term

Which type of wireless LAN mode allows 2 or more devices to share recourses without the use of an access point?

 

A) Splitterless

 

B) Ad hoc

 

C) Point-to-point

 

D) Infrastructure

Definition

B,

 

ad hoc

Term

What is the maximum data rate of the 802.11b standard?

 

A) 11mbps

 

B) 22mbps

 

C) 54mbps

 

D) 200mbps

Definition

A,

 

11mbps

Term

WiMax is based on which of the following standards?

 

A) IEEE 802.11

 

B) IEEE 802.15

 

C) IEEE 802.16

Definition

C,

 

WiMax is classified as IEEE 802.16 (WMAN)

Term

Your office currently runs a mix of 802.11b (2.4ghz) and 802.11g (2.4ghz) clients. Rumor has it that your company is about to merge with another comapny that uses a different wireless technology. Which of the following would be compatible with what your WLAN currently runs?

A) 802.11a

 

B) Bluetooth

 

C) 802.11n

 

D) None of the above 

Definition

C,

 

802.11N,

 

802.11n runs on the 2.4ghz frequency, so it's backwards compatible with the standards that run on that frequency (b and g clients). 

Term
NAT means...
Definition
Network Address Translation
Term
Wi-Fi means...
Definition
Wireless Fidelity
Term
WPA means...
Definition
Wireless Protection Access
Term
WLAN means...
Definition
Wireless Local Area Network
Term
Write down three major characteristics of wireless media...
Definition

1) Limited Bandwidth

 

2) Easy to Hack

 

3) High Error Rate

 

4) Broadcast Transmission Issues

Term

Based on the following traceroute result, answer questions:

 

[image]

What is the maximum round trip delay/time measured between the sending computer and the destination computer?

A) 48.568 ms

 

C) 48.716 ms 

Definition

A,

 

(it's line 15, near the IP address of the computer)

Term

Based on this routing table, which link has the largest Delay?

 

[image]

 

A) The link between hop 1 and 2

 

B) The link between hop 6 and 7

 

C) The link between 14 and 15

 

Definition

B,

 

The link between hop 6 and 7

Term

Given a home router with a back panel like the following graph, draw the internal structure of the home router. Show its connection with the DSL/Cable Modemthe WAN interface and the LAN interface, and it's 2 NICs

 

[image]

Definition
[image]
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