Deck 6: The Internet

Question 1

A news article states that hackers tried to redirect unsuspecting users to infected sites using a technique called
cache poisoning. (Hint: Use the acronym.)

Answer 1

Domain Name Sever
• The technique used to redirect web site from one to another when DNS is malfunctioned is called DNS Cache Poisoning.
• Therefore, the hacker used this DNS Cache Poisoning technique to divert the website.
Therefore, the appropriate word to fill in the blank is DNS.

Question 2

Your friend is setting up a cable Internet connection. You recommend that she connect a router between her computer and the cable modem, and explain that network
translation can help to secure her computer against intrusions.

Answer 2

Address
• Network Address Translation (NAT) is used to keep track of the packets with respect to their IP address.
• Since, it is used as a security technique, I request my friend to use NAT between the router and system or computer to set a cable internet connection.
Therefore, the appropriate word to fill in the blank is Address.

Question 3

, which adheres to IEEE 802.16 standards, is one of the most promising fixed wireless Internet technologies.

Answer 3

WIMAX
WIMAX stands for worldwide interoperability for microwave access. It is also designated as IEEE 802.16 by Ethernet compatibility network.
It acts as an alternative to DSL where cable service or telephone lines are not available such as in rural area.
A WIMAX sends and receive data with the help of WIMAX antennas. A WIMAX is capable of covering approximate 8 KM area. It can transmit data at 70Mbps rate.
Therefore, the appropriate word to fill in the blank is WIMAX.

Question 4

Make a timeline of events associated with the evolution of the Internet.

Question 5

Give examples of synchronous and asynchronous communications offered on the Internet.

Question 6

Internet access can be defined as the ability to use the Internet while walking or traveling in a moving vehicle.

Question 7

You're installing a high-speed Internet connection. The modem has a cable like the one shown at right. This modem is designed to connect to a computer's
port.

Question 8

Explain how Voice over IP works, and compare it to cell phone and land line services.

Question 9

A Wi-Fi
is an area in which the public can access a Wi-Fi network that offers Internet service.

Question 10

Draw a conceptual diagram illustrating the Internet backbone, NAPs, NSPs, routers, and ISPs. Extend the diagram to show how computers on a LAN access the Internet through a single DSL modem.

Question 11

List two examples of distributed grid computing and two examples of cloud computing.

Question 12

G technologies include EV-DO, HSUPA, and EDGE.

Question 13

Your Internet access seems very slow one day. You might be able to use a networking utility called
to discover the source of the slowdown.

Question 14

Draw diagrams to illustrate how FTP, the original Napster, and Bit Torrent work.

Question 15

WAP devices have been replaced by devices that use mobile
technologies offering the full Internet experience.

Question 16

List at least five protocols used on the Internet and describe what they are used for.

Question 17

Make a list of security concerns that are related to Internet access.

Question 18

Portable
technology can be used to access the Internet from remote locations where there are no cable, WiMAX, or cellular networks.

Question 19

Suppose that you decide to open a little Web store to sell handcrafted pottery. Your Web site will need a(n)
name.

Question 20

Make a checklist of steps you can take to secure your computer from Internet-based intrusions.

Question 21

computing offers Internet-based computer resources on demand so that individuals and businesses can contract for access as these resources are needed.

Question 22

Explain the differences between static IP addresses, dynamic IP addresses, private IP addresses, and domain names.

Question 23

TCP\
is the primary protocol suite used on the Internet.

Question 24

Instant messaging, chat, and VoIP are classified as
communications because both parties have to be online.

Question 25

You frequently use public Wi-Fi hotspots in cafes and other locations. To keep your passwords and other confidential data safe, you work with your employer to install a(n)
that encrypts the data you transmit over the Internet. (Hint: Use the acronym.)

Question 26

204.127.129.1 is an example of an IPv4 address. True or false

Question 27

VoIP quality can be affected by
that results from too much packet latency.

Question 28

Describe the difference between Ping and Traceroute by giving an example of when each would be used.

Question 29

A(n)
name server maintains a database of IP addresses that correspond to addresses such as www.nike.com.

Question 30

On some sites,
FTP can be used to upload and download files even if you don't have an account on the FTP server.

Question 31

Suppose you have installed a cable modem on a standalone PC. To secure your computer, you should activate
software to filter packets entering and leaving your computer.

Question 32

If you ping Google from your computer and get a result of 46 ms, you have a relatively slow Internet connection. True or false

Question 33

is a peer-to-peer file sharing protocol that uses a "swarm" of computers to exchange chunks of data that can eventually be assembled into complete files.

Question 34

List the advantages and disadvantages of dial-up, cable, DSL, satellite, and fixed wireless Internet services. List the Internet access methods in which upstream transmission rates differ from downstream rates.

Question 35

Most ISPs offer
Internet connections, meaning the downstream speed is faster than the upstream speed.

Question 36

Hackers use
scanning software to look for computers connected to the Internet that are vulnerable to intrusions.

Question 37

Your friend, a film student, has created a 20-minute short film that she wants to distribute to friends. The file is much too large to be an e-mail attachment and she doesn't have access to a(n)
server. You suggest that she try posting it at a(n)
P2P file sharing site where a swarm of computers can assist with the downloads.

Question 38

Dial-up and DSL Internet access use the telephone cables already installed in a home or business. True or false

Question 39

software monitors network activity, blocks packets from suspicious IP addresses, and reports intrusion attempts.

Question 40

List the options for mobile and portable Internet access, and explain their strengths and weaknesses.

Question 41

Always-on connections are not a security risk because they use DOCSIS. True or false

Question 42

One of the best defenses against intrusions is to install a(n)
between your standalone computer or LAN and your Internet connection device.

Question 43

Your friend wants you to follow her tweets and asks if you have a(n)
account.

Question 44

The two requirements for cable Internet service are circuitry to handle
protocols and a cable modem.

Question 45

A(n)
IP address is a non-routable IP address that can be used within a LAN, but not for Internet data transport.

Question 46

Explain the advantages of mobile broadband services compared to WAP service.

Question 47

Satellite Internet service typically has a high
rate, which is unsuitable for some online gaming and Voice over IP.

Question 48

When using a public Wi-Fi hotspot, you can use a personal
to encrypt data that travels from your computer. (Hint: Use the acronym.)