5-A

Question 1

What is an LAN?

Answer 1

A local area network (LAN) is of limited use without an Internet connection.

Question 2

What is the role of ISPs in Internet connectivity?

Answer 2

ISPs use high-speed links and transit/peering arrangements to connect local networks to the Internet.

Question 3

What is a modem?

Answer 3

A modem establishes the physical connection to the WAN interface for Internet access.

Question 4

What function does a router serve in networking?

Answer 4

A router identifies networks and forwards data between them using Internet Protocol (IP).

Question 5

What does DSL stand for?

Answer 5

Digital Subscriber Line.

Question 6

What is the primary function of the public switched telephone network (PSTN)?

Answer 6

To enable communication over both fiber optic and copper cabling.

Question 7

What are the two main types of DSL?

Answer 7

Asymmetrical DSL (ADSL) and Symmetrical DSL.

Question 8

What is ADSL known for?

Answer 8

Providing faster downlink speeds compared to uplink speeds.

Question 9

What does VDSL stand for?

Answer 9

Very High-Speed Digital Subscriber Line.

Question 10

What is the major disadvantage of satellite Internet?

Answer 10

Increased latency due to the distance signals must travel.

Question 11

Fill in the blank: A fiber to the ______ connection means fiber optic cable goes directly to the customer’s building.

Answer 11

Premises.

Question 12

What does FTTC stand for?

Answer 12

Fiber to the Curb.

Question 13

What is the typical downstream speed for VDSL over 300 meters?

Answer 13

52 Mbps for asymmetric and 26 Mbps for symmetric.

Question 14

What does DOCSIS stand for?

Answer 14

Data Over Cable Service Interface Specification.

Question 15

What is a WISP?

Answer 15

Wireless Internet Service Provider.

Question 16

True or False: 5G uses a single large antenna to serve a wide area.

Answer 16

False.

Question 17

What is the role of a firewall in networking?

Answer 17

To control which computers can connect to networks and filter traffic.

Question 18

What type of router forwards traffic to and from the Internet?

Answer 18

WAN or border router.

Question 19

What does the acronym ACL stand for in networking?

Answer 19

Access Control List.

Question 20

What is a key feature of 4G and 5G networks?

Answer 20

They can be used for fixed-access wireless broadband solutions.

Question 21

What is the typical round trip time (RTT) delay for satellite Internet?

Answer 21

600–800 ms.

Question 22

Fill in the blank: A cable modem connects to the service provider network using a ______.

Answer 22

coaxial cable.

Question 23

What technology is used by low Earth orbit (LEO) satellites?

Answer 23

Phased array technology.

Question 24

What is the difference between GSM and CDMA in cellular technology?

Answer 24

GSM uses removable SIM cards; CDMA does not.

Question 25

What type of connections do DSL modems typically use?

Answer 25

RJ11 and RJ45 ports.

Question 26

What is the purpose of a splitter in DSL installations?

Answer 26

To separate voice and data signals.

Question 27

What is the purpose of an Optical Network Terminal (ONT)?

Answer 27

To convert optical signals to electrical ones for local routing.

Question 28

What is the role of a network firewall?

Answer 28

To filter allowed and denied hosts and protocols ## Footnote A network firewall is essential in managing traffic between different network segments.

Question 29

What is a network access control list (ACL)?

Answer 29

A set of rules configured in a firewall to determine traffic permissions ## Footnote Each entry in the ACL specifies source and/or destination addresses and protocol types.

Question 30

How can firewalls be deployed within a private network?

Answer 30

To restrict access to specific clients connecting to certain servers ## Footnote This is achieved by placing servers behind a local network firewall.

Question 31

What kind of functionality can most routers implement?

Answer 31

Basic firewall functionality ## Footnote Many routers have built-in options to manage traffic rules.

Question 32

What is a standalone firewall appliance?

Answer 32

A dedicated device that performs deeper analysis of application protocol data ## Footnote These appliances use sophisticated rules to manage traffic.

Question 33

What are unified threat management (UTM) appliances?

Answer 33

Devices that perform multiple security functions including firewall capabilities ## Footnote UTM appliances integrate various security measures into one system.

Question 34

What are personal or software firewalls?

Answer 34

Firewalls installed on a single computer to protect it from threats ## Footnote Unlike network firewalls, these focus on individual device security.

Question 35

What type of cable is required to connect an ADSL router's WAN interface?

Answer 35

ADSL cable ## Footnote This is necessary for establishing a connection to the service provider.

Question 36

What type of cable is needed for a full fiber connection to an optical network terminal (ONT)?

Answer 36

Fiber optic cable ## Footnote This cable type is essential for transmitting high-speed internet signals.

Question 37

True or false? Both 4G and 5G cellular can be used for fixed access broadband as well as in mobile devices.

Answer 37

True ## Footnote Both technologies support internet access in various forms.

Question 38

True or false? A SOHO router uses an embedded modem and Ethernet adapter to forward traffic between public and private network segments over a single hardware port.

Answer 38

True ## Footnote SOHO routers are designed for small office and home office environments.