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Udemy Net+ 10-009 > Network Devices > Flashcards

Network Devices Flashcards

(55 cards)

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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

Describe the benefits VLANs provide in three adjectives ?

A

Flexibile, scalable, and cost efficient

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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 connectivity 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

They 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

Device or software that drops 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 ?

24
Q

Does the IDS do anything about the intrusion ?

25
What is a load balancer ?
Device or software that distributes incoming network traffic across multiple servers
26
What do load balances ensure ?
No single server becomes overwhelmed
27
What can load balancers improve ?
Reliability and availability of applications
28
What information can a load balancer use to make decisions ?
IP addresses, TCP/UDP ports, or application-level content
29
Proxy server
Device or software acting as an intermediary between a user's device and the internet
30
What other functionalities does a proxy server have ?
Content caching, access control, and filtering to enhance security and performance
31
Are proxies similar to firewalls ?
Either implemented on firewalls or are firewalls also
32
Network attached storage (NAS)
Dedicated file storage device connected to a network
33
What features are NAS systems designed with?
With easy file sharing, data backups, and centralized data management
34
What protocols does NAS support ?
NFS, SMB/CIFS, AFP
35
What two characteristics does NAS offer to share files across different platforms and devices ?
Scalability and cost-effectiveness
36
What are SANs designed to do ?
To handle large volumes of data transfers
37
What do SANs improve with applications ?
Availability and performance
38
What do SANs enhance ?
Storage solutions and data management
39
Access point
Networking devices that allow wireless devices to connect to wired networks using WiFi or similar standards
40
What layer do APs operare at ?
Layer 2
41
What do APs bridge together ?
Wireless and wired segments of a network
42
Can APs extend network coverage ?
Yes, it provides network access to wireless devices within their range
43
Wireless LAN controller
Manages WAPs in a network, centralizing control of the WLAN
44
How do WLCs simplify wireless networks ?
Deployment and management of wireless networks (configuration, security policies, manage guest access)
45
Content Delivery Network (CDN)
Globally distributed network of proxy servers and data centers
46
Do CDN, cache content, like web pages, videos, and images
Yes
47
Why do CDNs cache content ?
To reduce latency and improve access speed for users regardless of their location
48
Virtual private network
Technology that creates a safe and encrypted connection over a less secure network
49
How are VPNs used ?
To establish a secure connection between remote users or remote sites and an organization private network
50
What does a VPN act as ?
A devices direct connection to the private network
51
Quality of Service (QoS)
Set of technologies and policies that manage and prioritize network traffic to ensure the performance of critical applications and services
52
What does QoS assign higher priority to ?
Voice and video communications
53
What does QoS help reduce ?
Latency, jitter, and packet loss
54
Time to live (TTL)
Maximum time or number of hops before a packet gets discarded
55
What does TTL help prevent ?
Indefinite looping

Udemy Net+ 10-009 (13 decks)

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