Network Devices

Question 1

What are physical appliances?

Answer 1

Dedicated hardware devices focused on specific network functions

Question 2

What do physical appliances need ?

Answer 2

Higher cost and space

Question 3

What are virtual appliances ?

Answer 3

Software based solutions that run on virtual machines

Question 4

Describe the benefits VLANs provide in three adjectives ?

Answer 4

Flexibile, scalable, and cost efficient

Question 5

Would physical or virtual appliances perform better ?

Answer 5

Physical

Question 6

What do routers use to determine the best path for forwarding packets to their destination ?

Answer 6

Routing tables

Question 7

What do routers also provide ?

Answer 7

Security like firewalls and VPN support

Question 8

Do routing tables connect multiple networks together ?

Answer 8

Yes

Question 9

How does a switch forward data ?

Answer 9

Based on MAC address

Question 10

Is each port on a switch a collision domain ? What does it help with ?

Answer 10

Yes, they help with improving network efficiency by reducing collisions

Question 11

What connectivity are layer 2 switches used for ?

Answer 11

Connect devices within the same network or VLAN

Question 12

What is a firewall ?

Answer 12

Monitors incoming/outgoing network traffic

Question 13

What do firewalls decide ?

Answer 13

To allow or block specific traffic based on a defined set of security rules

Question 14

Why are firewalls crucial ?

Answer 14

They establish a barrier between secure internal networks and untrusted external networks

Question 15

What are IDS (intrusion detection system) ?

Answer 15

detect malicious network activity

Question 16

What techniques do IDS use ?

Answer 16

Signature identification techniques like antimalware

Question 17

Is anomalous behavior detectable by IDS ?

Answer 17

Yes

Question 18

What is an IPS (intrusion prevention system) ?

Answer 18

Device or software that drops packets or connections that are identified as malicious

Question 19

What must be configured on an IPS for it to identify traffic ?

Answer 19

Rules

Question 20

Can these IPS devices operate at multiple layers ?

Answer 20

Yes

Question 21

Does the IDS do anything about the intrusion ?

Answer 21

No

Question 22

What is a load balancer ?

Answer 22

Device or software that distributes incoming network traffic across multiple servers

Question 23

What do load balances ensure ?

Answer 23

No single server becomes overwhelmed

Question 24

What can load balancers improve ?

Answer 24

Reliability and availability of applications

Question 25

What information can a load balancer use to make decisions ?

Answer 25

IP addresses, TCP/UDP ports, or application-level content

Question 26

Proxy server

Answer 26

Device or software acting as an intermediary between a user's device and the internet

Question 27

What other functionalities does a proxy server have ?

Answer 27

Content caching, access control, and filtering to enhance security and performance

Question 28

Are proxies similar to firewalls ?

Answer 28

Either implemented on firewalls or are firewalls also

Question 29

Network attached storage (NAS)

Answer 29

Dedicated file storage device connected to a network

Question 30

What features are NAS systems designed with?

Answer 30

With easy file sharing, data backups, and centralized data management

Question 31

What protocols does NAS support ?

Answer 31

NFS, SMB/CIFS, AFP

Question 32

What two characteristics does NAS offer to share files across different platforms and devices ?

Answer 32

Scalability and cost-effectiveness

Question 33

What do SANs improve with applications ?

Answer 33

Availability and performance

Question 34

Access point

Answer 34

Networking devices that allow wireless devices to connect to wired networks using WiFi or similar standards

Question 35

What layer do APs operare at ?

Answer 35

Layer 2

Question 36

What do APs bridge together ?

Answer 36

Wireless and wired segments of a network

Question 37

Can APs extend network coverage ?

Answer 37

Yes, it provides network access to wireless devices within their range

Question 38

Wireless LAN controller

Answer 38

Manages WAPs in a network, centralizing control of the WLAN

Question 39

How do WLCs simplify wireless networks ?

Answer 39

Deployment and management of wireless networks (configuration, security policies, and guest access)

Question 40

Content Delivery Network (CDN)

Answer 40

Globally distributed network of proxy servers and data centers

Question 41

Do CDN, cache content, like web pages, videos, and images

Answer 41

Yes

Question 42

Why do CDNs cache content ?

Answer 42

To reduce latency and improve access speed for users regardless of their location

Question 43

Virtual private network

Answer 43

Technology that creates a safe and encrypted connection over a less secure network

Question 44

How are VPNs used ?

Answer 44

To establish a secure connection between remote users or remote sites and an organization private network

Question 45

What does a VPN act as ?

Answer 45

A devices direct connection to the private network

Question 46

Quality of Service (QoS)

Answer 46

Set of technologies and policies that manage and prioritize network traffic to ensure the performance of critical applications and services

Question 47

What does QoS assign higher priority to ?

Answer 47

Voice and video communications

Question 48

What does QoS help reduce ?

Answer 48

Latency, jitter, and packet loss

Question 49

Time to live (TTL)

Answer 49

Maximum time or number of hops before a packet gets discarded

Question 50

What does TTL help prevent ?

Answer 50

Indefinite looping