Chapter 4: Components and Devices Flashcards Preview

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Flashcards in Chapter 4: Components and Devices Deck (18)
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1

Access Point

Can operate as a bridge connecting a standard wired network to wireless devices or as a router passing data transmissions from one access point to another; Many APs can provide firewall capabilities and DHCP service; Can give client systems a private IP address and prevent Internet traffic from accessing those systems; Layer 2 device

2

Analog Modem

Device that converts the digital signals generated by a computer into analog signals that can travel over conventional phone lines; Means to connect to ISP or for dialing up a LAN

3

Firewall

ExamAlert: Remember that a firewall can protect internal networks from public networks and control access between specific network segments

4

Intrusion Detection System vs Intrusion Prevention System

Behavior based
Signature based
Network-based intrusion detection system (NIDS)
Host-based intrusion detection system (HIDS)

5

Hub (Passive vs Active)

Layer 1

6

Load Balancer

Remember that load balancing increases redundancy and therefore data availability. Also load balancing increases performance by distributing the workload

7

Traffic shaping

Mechanism used to control bandwidth usage on a network (Monitoring and shaping)

8

Router

Derives its name from routing data it receives from one network to another; When receiving a packet, reads the header to determine the destination address

9

Switch

Forwards data only to the port that connects to the destination device by matching the MAC address of connected devices to destination MAC address in the data received

10

Multilayer switch

A switch that can operate at both Layer 2 and Layer 3 of the OSI model, which means that the multilayer device can operate as both a switch and router; Directs traffic within the LAN and can forward packets between subnets

11

VPN concentrator

Used to increase remote-access security; Secure connection (tunnel) between the sending and receiving network devices

12

Network Devices Summary

PG.147

13

Virtual Local-Area Networks (VLANs)

VLANs enable you to create multiple broadcast domains on a single switch.

14

VLAN Trunking Protocol (VTP)

Reduce administration in the switched network

15

Trunking

Falls under 802.1Q and a trunk port (usually fiber optic) is one that is assigned to carry traffic for a specific switch

16

Port binding

Determines whether and how a port is bound (static, dynamic, or ephemeral)

17

Port Aggregation

Combining of multiple ports on a switch (Auto, Desirable, or On)

18

Link Aggregation Control Protocol (LACP)

Allows multiple physical ports to be bound together