Page 76 - CSW - BT Cisco Sales Workshop

Key Takeaways – (1 of 2)

• Hub

• Antiquated, non-intelligent Layer 1 Network Component used to connect Devices
into a LAN

• Switch
• Intelligent, Layer 2 LAN Device that replaced Hubs and offers advanced features that are used in
modern Corporate Networks today

• Router
• Intelligent, Layer 3 Device that connects different Networks together. Routers form the backbone of the
Internet and allow Devices to communicate around the world. Routers can connect LANs across WANs

• Data Center
• A physical facility where companies maintain Servers which run Applications and store large amounts of
information for the Business.

• Firewall
• A security Device (or Software) that prevents unauthorized access to or from a Network. You always
need a Firewall when connecting to the Internet.