Network Devices Flashcards
Hub
Receives bits in one port and retransmits on all other ports.
Layer 1 device. Outdated.
Bridge
Joins LAN segments.
Makes intelligent forwarding decisions based on destination MAC address. Makes forwarding decisions in software.
Layer 2 device. Replaced with switches.
Switch
Dynamically learns MAC address attached to various ports.
Layer 2 device.
Multilayer Switch
Can make forwarding decisions based on IP address.
Router
Makes forwarding decisions based on IP address.
Layer 3 device.
VPN Concentrator
Terminates multiple VPN tunnels
DNS
Domain Name System
Resolves domain name to IP address
DDNS
Dynamic DNS
Monitors IP address of device in DNS. If change is detected then it is reported to the service provide.
IPAM
IP Address Management
Integrates DNS and DHCP so each is aware of changes to the other.
DHCP
Dynamic Host Configuration Protocol DISCOVER OFFER REQUEST ACK
Proxy Server
Sends requests to the internet on behalf of clients.
Provides security, content filtering, and balance bandwidth.
Content Engines
Performs content caching to save bandwidth
Content Switch
aka Load Balancer
Distributes incoming requests across various servers
Wireless Range Extender
Amplify signal and extend reachability of a wireless cell
NGFW
Next-Generation Firewall
Perform stateless and stateful traffic filtering, deeply inspect packet contents, and connect to cloud for updates
