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Udemy Net+ 10-009 > Network Devices > Flashcards

Network Devices Flashcards

1
Q

What are physical appliances?

A

Dedicated hardware devices focused on specific network functions

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2
Q

What do physical appliances need ?

A

Higher cost and space

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3
Q

What are virtual appliances ?

A

Software based solutions that run on virtual machines

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4
Q

What benefits do VLANs provide ?

A

Flexibility, scalability, and cost efficiency

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5
Q

Would physical or virtual appliances perform better ?

A

Physical

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6
Q

Where does the router operate ?

A

Network layer

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7
Q

How do routers direct data packets between networks ?

A

IP address

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8
Q

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

A

Routing tables

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9
Q

What do routers also provide ?

A

Security like firewalls and VPN support

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10
Q

Do routing tables connect multiple networks together ?

A

Yes

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11
Q

What layer does the switch operate at ?

A

Layer 2

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12
Q

How does a switch forward data ?

A

Based on MAC address

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13
Q

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

A

Yes, they help with improving network efficiency by reducing collisions

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14
Q

What are layer 2 switches used for ?

A

Connect devices within the same network or VLAN

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15
Q

What is a firewall ?

A

Monitors incoming/outgoing network traffic

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16
Q

What do firewalls decide ?

A

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

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17
Q

Why are firewalls crucial ?

A

Establish a barrier between secure internal networks and untrusted external networks

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18
Q

What are IDS (intrusion detection system) ?

A

detect malicious network activity

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19
Q

What techniques do IDS use ?

A

Signature identification techniques like antimalware

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20
Q

Is anomalous behavior detectable by IDS ?

A

Yes

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21
Q

What is an IPS (intrusion prevention system) ?

A

Drop packets or connections that are identified as malicious

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22
Q

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

A

Rules

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23
Q

Can these IPS devices operate at multiple layers ?

A

Yes

24
Q

Does the IDS do anything about the intrusion ?

A

No

25
Q

What is a load balancer ?

A

Device or software that distributes incoming network traffic across multiple servers

26
Q

What do load balances ensure ?

A

No single server becomes overwhelmed

27
Q

What can load balancers improve ?

A

Reliability and availability of applications

28
Q

What does a load balancer use to make decisions ?

A

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

29
Q

Proxy server

A

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

30
Q

What other functionalities does a proxy server have ?

A

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

31
Q

Are proxies similar to firewalls ?

A

Either implemented on firewalls or are firewalls also

32
Q

Network attached storage (NAS)

A

Dedicated file storage device connected to a network

33
Q

How are NAS systems designed ?

A

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

34
Q

What protocols does NAS support ?

A

NFS, SMB/CIFS, AFP

35
Q

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

A

Scalability and cost-effectiveness

36
Q

What are SANs designed to do ?

A

To handle large volumes of data transfers

37
Q

What do SANs improve ?

A

Availability and performance of applications

38
Q

What do SANs enhance ?

A

Storage solutions and data management

39
Q

Access point

A

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

40
Q

What layer do APs operare at ?

A

Layer 2

41
Q

What do APs bridge together ?

A

Wireless and wired segments of a network

42
Q

Can APs extend network coverage ?

A

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

43
Q

Wireless LAN controller

A

Manages WAPs in a network, centralizing control of the WLAN

44
Q

What do WLCs simplify ?

A

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

45
Q

Content Delivery Network (CDN)

A

Globally distributed network of proxy servers and data centers

46
Q

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

A

Yes

47
Q

Why do CDNs cache content ?

A

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

48
Q

Virtual private network

A

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

49
Q

How are VPNs used ?

A

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

50
Q

What does a VPN act as ?

A

A devices direct connection to the private network

51
Q

Quality of Service (QoS)

A

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

52
Q

What does QoS assign higher priority to ?

A

Voice and video communications

53
Q

What does QoS help reduce ?

A

Latency, jitter, and packet loss

54
Q

Time to live (TTL)

A

Maximum time or number of hops before a packet gets discarded

55
Q

What does TTL help prevent ?

A

Indefinite looping

Udemy Net+ 10-009 (7 decks)

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