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12 Cards in this Set
- Front
- Back
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HUB OSI Layer, Purpose |
HUB * Multiport repeaters acting on one collision domain. Good for diagnostics and nothing else * Should be upgraded to a switch if still in use |
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SWITCH OSI Layer, Purpose |
SWITCH * Store an in-memory MAC table and provide dedicated bandwidth to each port. * Unlike a repeater, each port is in a separate collision domain, minimizing traffic. |
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ROUTER OSI Layer, Purpose |
ROUTER * Separates entire networks. * Also allows communication between networks. |
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WAP OSI Layer, Purpose |
WIRELESS ACCESS POINT * OSI Layer 2 Device (Data Link) * Provides IEEE 802.11 (Wireless Ethernet) Connectivity |
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ETHERNET DOMAINS How are domains separated? |
ETHERNET DOMAINS * SWITCH - Separate collision domains * ROUTER - Separate collision domains residing in each broadcast domain |
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FIREWALL Purpose |
Selectively allow or block network traffic based on IP addresses and port numbers. |
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IDS, NIDS, HIDS Purpose |
INTRUSION DETECTION SYSTEM * Passive detection of network attacks * Also known as NIDS (Network-based Intrusion Detection System) * HIDS: Host-based Intrusion Detection System. * Signatures and Anomalies |
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PROXY/CONTENT FILTER Purpose |
PROXY/CONTENT FILTER * Acts on behalf of other devices * Content filter: Classifies websites and prevents or allows access according to content |
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ANALOG MODEM Purpose |
ANALOG MODEM * MOdulate/DEModulate * Still used on special purpose devices that do not need a higher speed (FAX Machines) |
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VPN CONCENTRATOR Purpose |
VPN CONCENTRATOR * Provides dedicated hardware circuitry to host virtual private network (VPN) connections * VPNs can run on server software, but are often heavy on system resources and a concentrator provides a more permanent solution. |
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LOAD BALANCER Purpose |
LOAD BALANCER * Distributes incoming traffic across multiple nodes * Provides HA (high availability) * Gives users a faster experience by not bogging down one node |
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PACKET SHAPER Purpose |
PACKET SHAPER * Makes sure that certain types of traffic always have appropriate level of bandwidth * Prioritizes network traffic based upon a user-defined set of rules |
