8 Questions
What is the primary function of a hub in a network?
To concentrate hosts and allow the network to see them as a single unit
What is the main difference between a bridge and a switch?
A bridge converts data transmission formats, but a switch does not
What is the primary function of a router in a network?
To regenerate signals and convert data transmission formats
What is the main function of a gateway in telecommunications?
To allow data to flow from one discrete network to another
What is the primary function of a firewall in a network?
To control network security and access rules
What is a characteristic of active hubs?
They regenerate signals and concentrate hosts
What is a key difference between a gateway and a router?
A gateway communicates using more than one protocol
What is a key role that firewalls play in network security?
To reject access requests from unrecognized sources
Study Notes
Network Devices
- Hubs concentrate on connections, grouping hosts together, and allowing the network to see them as a single unit, with active hubs also regenerating signals.
- Hubs do not affect data transmission, working passively.
Bridges
- Bridges convert network data formats and perform basic data transmission management.
- They provide connections between LANs, checking data to determine if it should cross the bridge, making each part of the network more efficient.
Switches
- Switches add intelligence to data transfer management, determining if data should remain on a LAN.
- They transfer data only to the connection that needs it, without converting data transmission formats.
Routers
- Routers have all the capabilities of hubs, bridges, and switches.
- They can regenerate signals, concentrate multiple connections, convert data transmission formats, and manage data transfers.
- Routers can also connect to a WAN, connecting LANs separated by great distances.
Gateways
- Gateways are networking hardware that allows data to flow from one discrete network to another.
- They communicate using more than one protocol to connect multiple networks, distinct from routers or switches.
Firewalls
- Firewalls are network devices or software controlling network security and access rules.
- They are inserted between internal networks and external networks like the Internet, rejecting access requests from unrecognized sources.
- Firewalls play a vital role in network security, growing in importance with the increase in cyber attacks.
Learn about the roles of hubs and bridges in computer networks, including their functions and differences.
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