3.1 KiB
id, aliases, tags
| id | aliases | tags | ||
|---|---|---|---|---|
| 1771668476-SUCR |
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Network Devices
What is a network
A computer network is a digital telecommunications network which allows nodes to share resources.
Router
Is represented with a circle where inside there are 2 horizontal arrow poiting inside and 2 vertical arrow pointing outside
Have fewer network interfaces than switches Are used to provide connectivity between LANs Are therefore used to send data over the Internet
example of Cisco routers:
Switch
Is represented with square 4 horizontal 2 poiting to the left and 2 pointing to the right
Switches a used to connect a LAN
Have many network interfaces/oirts for end hosts to connect to (usually 24) Provide connectivity to hosts within the same LAN do not provide connectivity between LANs/ over the internet
example of Cisco switches:
Firewall
Is represented with square with a brickwall inside of it
Monintor and control network traffic based on configured rules. Can be placed 'Inside' the network, or 'outside' the network Are known as 'Next-Generation Firewall' when they include more modern and advanced filtering capabilities
example of Cisco firewalls:
Host-based firewalls
Are software applications that filter traffic entering and exiting a host machine, like a PC
Server
Is represented with square with a computer inside of it
A device that provides functions or services for clients.
The same device can be a client in some situations, and a server in other situations.
Client
Is represented with square with a monitor inside of it
Can be a computer, a laptop, or a phone
A client is a device that accesses a service made available by a server.
Internet
Is represented with circle with a cloud inside of it
Building a network
2 pc connected together create a network
Quiz
- Your company wants to purchase some network hardware to which they can plug the 30 PCs in your department. which type of network device is appropriate?
a) A router b) A firewall c) A switch d) A server
good answer: c
- You received a video file from your friend's Apple iPhone using AirDrop. What was his iPhone functioning as in that transaction?
a) A server b) A client c) A LAN
good answer: a
- what is your computer or smartphone functioning as while you watch this video?
a) A server b) An end host c) A client
good answer: c
- Your company wants to purchase some network hardware to connect its separate network together. what kind of network device is appropriate ?
a) A firewall b) A host c) a LAN d) A router
good answer: d
- Your company wants to upgrade its old network firewall that has been in use for several years to one that provides more advanced function. What kind of firewall should they purchase ?
a) A host-based firewall b) A next-level firewall c) A next-generation firewall d) A top-layer firewall
good answer: c