CompTIA A+ 220-1201 (2.4 - VLANs and VPNs)

LANs

• Local Area Networks

• A group of devices in the same broadcast domain

Virtual LANs

• Virtual Local Area Networks

- A group of devices in the same broadcast domain

- Separated logically instead of physically

Configuring VLANs

• Virtual Local Area Networks

- A group of devices in the same

broadcast domain

VPNs

• Virtual Private Networks

- Encrypted (private) data traversing a public network

• Concentrator

- Encryption/decryption access device

- Often integrated into a firewall

• Many deployment options

- Specialized cryptographic hardware

- Software-based options available

• Used with client software

- Sometimes built into the OS

Client-to-Site VPN

• On-demand access from a remote device

- Software connects to a VPN concentrator

• Some software can be configured as always-on

Site-to-site VPN

• Always-on

- Or almost always

• Firewalls often act as VPN concentrators

- Probably already have firewalls in place