Chapter 4: Components and Devices

Question 1

Access Point

Answer 1

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

Question 2

Analog Modem

Answer 2

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

Question 3

Firewall

Answer 3

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

Question 4

Intrusion Detection System vs Intrusion Prevention System

Answer 4

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

Question 5

Hub (Passive vs Active)

Answer 5

Layer 1

Question 6

Load Balancer

Answer 6

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

Question 7

Traffic shaping

Answer 7

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

Question 8

Router

Answer 8

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

Question 9

Switch

Answer 9

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

Question 10

Multilayer switch

Answer 10

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

Question 11

VPN concentrator

Answer 11

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

Question 12

Network Devices Summary

Answer 12

PG.147

Question 13

Virtual Local-Area Networks (VLANs)

Answer 13

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

Question 14

VLAN Trunking Protocol (VTP)

Answer 14

Reduce administration in the switched network

Question 15

Trunking

Answer 15

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

Question 16

Port binding

Answer 16

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

Question 17

Port Aggregation

Answer 17

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

Question 18

Link Aggregation Control Protocol (LACP)

Answer 18

Allows multiple physical ports to be bound together