Section 2.1

Question 1

What do hubs do?

Answer 1

They repeat data to every port

Question 2

What does a bridge do?

Answer 2

bridge two LAN segments, each with their own collision domains, and forward data with MAC addresses

Question 3

What do switches do?

Answer 3

They forward data based on MAC addresses

Question 4

What do routers do?

Answer 4

They route data based on IP addresses

Question 5

What do wireless access points do?

Answer 5

connect you to wired networks

Question 6

What does broadband mean?

Answer 6

capable of transmitting a wide range of frequencies

Question 7

What do cable and DSL modems connect you to?

Answer 7

broadband networks

Question 8

What do repeaters do?

Answer 8

Boost network signal

Question 9

What do media converters do?

Answer 9

They convert between different media, such as ethernet (copper) and fiber optics

Question 10

What OSI Layer device is an access point?

Answer 10

Layer 2

Question 11

What is the standard used for broadband over coaxial cable?

Answer 11

DOCSIS (Data Over Cable Service Interface Specification)

Question 12

What does the A in ADSL stand for and what does it mean?

Answer 12

Asymmetric
It means that download and upload speeds are not the same

Question 13

How do you manage and configure all the wireless access points in an enterprise environment?

Answer 13

with a Wireless LAN Controller (WLC)

Question 14

What is a Layer 3 capable switch?

Answer 14

a switch with routing capabilities

Question 15

What are the two main features of load balancers?

Answer 15

Distribute load between servers and provide fault tolerance

Question 16

What else do load balancers do?

Answer 16

offloads TCP protocol overhead
offloads encryption & decryption overhead
caching
prioritization

Question 17

What utility do proxies have?

Answer 17

Content filtering and management of application traffic

Question 18

If not a stand-alone device, where else can VPN Concentrators be found?

Answer 18

firewalls and server software

Question 19

What’s the technical term for the “phone switch”?

Answer 19

Private Branch Exchange (PBX) and VoIP PBX

Question 20

What does the Voice Gateway do?

Answer 20

Converts between VoIP and traditional phone lines (PSTN)

Question 21

What was in use before VoIP?

Answer 21

POTS
Plain Old Telephone Service

Question 22

What are 3 things that traditional firewalls filter?

Answer 22

IP- Source and Destination
Port number
Protocol

Question 23

What OSI layers do traditional firewalls operate at?

Answer 23

3 and 4

Question 24

What additional OSI layer do NGFWs operate at?

Answer 24

7

Question 25

DPI (for NGFWs)

Answer 25

Deep Packet Inspection

Question 26

What are 4 security functionalities NGFWs provide?

Answer 26

DPI, IDS/IPS, Malware detection, Real-Time Threat intelligence

Question 27

What’s a good method of connecting IoT devices to a network?

Answer 27

by creating a separate subnet/segment for IoT devices

Question 28

What is a VPN Headend, and what are its functions?

Answer 28

It’s where a VPN tunnel comes to an end/terminates. It authenticates, encrypts, decrypts, and routes.