Network Tools

Question 1

Hub

Answer 1

A network device that broadcast info to every devices on the network

• multi-port repeater
• becomes less efficient as network traffic increases
• half-duplex ( transmit in one direction at one time)
• Vulnerable to eavesdropping
• speeds of 10 megabit and 100 megabits

Question 2

Switch

Answer 2

Makes connections between specific devices on a network by sending and receiving data between them
- Controls flow of traffic and improves network performance
- Maintains MAC table
- bridges devices together
- Forwards traffic based on the data link address
- contains many ports and features
- may provide PoE (power over ethernet)
- OSI layer 2 (data link layer)

Question 3

Router

Answer 3

Connects multiple networks together

• Connects networks and direct traffic based on the IP address of the destination Network
• Can include a firewall
• Data link layer (2)

Laptop - Router - Other Router - Tablet

Question 4

Modem

Answer 4

Connects your router to the internet and brings internet access to the LAN

-Connectivity via telephone lines or Coaxial Cable
- Transmissions or digital signals from the internet and translate them into analog signals that can travel through physical connections provided by ISP(Internet Services Provider)
- Usually connect to a router that takes the decoded transmission and sends them on to the local network

Question 5

Virtualization tools

Answer 5

Pieces of software that preforms network operations

• Hub, Switch, Router, or Modem
• Offered by cloud service
• Cost saving and Scalability

Question 6

Firewall

Answer 6

Network security device that monitors traffic to or form your network

• Filters traffic based on the port number
• May be able to filter based on application traffic (OSI layer 7)
• OSI layer 4 (TCP/UDP layer)
• Can encrypt traffic into and out of the network, to protect it between sites
• Can proxy traffic
• May also have router functionality (OSI layer 3)

Question 7

Servers

Answer 7

Provide info and services for devices like computers, smart home devise, and smart phones on the network

• Devices that connect to a server are called clients

Client-Server Model - Clients send request to the server for into and services. the server preforms the request for the clients

Question 8

Wireless Access Points

Answer 8

provides wireless connectivity for a local network
provides a link between the wireless network and the wired network (a bridge)
makes forwarding decisions based on the destination mac address (identical process to a switch)