OBJ 2.1 X

Question 1

Layer 2 switch

Answer 1

▪ Each port on a switch represents an individual collision domain
▪ All ports belong to the same broadcast domain

Question 2

Layer 3 capable switch

Answer 2

▪ Layer 3 device used to connect multiple network segments together
▪ Can make Layer 3 routing decisions and interconnect entire networks
(like a router), not just network segments (like a switch)

Question 3

Router

Answer 3

Layer 3 device used to connect multiple networks together
▪ Make forwarding decisions based on logical network address information
● Such as using IP addresses (IPv4 or IPv6)
▪ Routers are typically more feature rich and support a broader range of
interface types than multilayer switches

Question 4

Hub

Answer 4

▪ Layer 1 device used to connect multiple network devices/workstations
▪ Known as multiport repeaters
▪ Three basic types of Ethernet hubs:
● Passive hub
o Repeats signal with no amplification
● Active hub
o Repeats signal with amplification
● Smart hub
o Active hub with enhanced features like SNMP

Question 5

Access point

Answer 5

Expands wired LAN into the wireless domain
● Does not interconnect two networks
(not a router)
● Functions as a hub

Question 6

Bridge

Answer 6

Bridges analyze source MAC addresses in frames entering the bridge and populate an internal MAC address table

Question 7

Wireless LAN controller

Question 8

Load balancer

Answer 8

Distributes incoming requests across various servers in a server farm

Question 9

Proxy server

Answer 9

A specialized device that makes requests to an external network on
behalf of a client

Question 10

Cable modem

Answer 10

▪ Hybrid Fiber-Coax (HFC) distribution network is a cable television
infrastructure containing both coaxial and fiber-optic cabling
▪ Specific frequency ranges are used for upstream and downstream data
transmission as determined by Data-Over-Cable Service Interface
Specification (DOCSIS)
● Upstream (5 MHz to 42 MHz)
● Downstream (50 MHz to 860 MHz)
▪ Transmits and receives over cable television infrastructure

Question 11

DSL modem

Question 12

Repeater

Answer 12

receives signal on one antenna and repeats it on other

Question 13

Voice gateway

Question 14

Media converter

Answer 14

Convert media from one format to another
▪ Layer 1 device
● Physical conversion of signal only
▪ Examples:
● Ethernet to Fiber Optic
● Fiber Optic to Ethernet
● Coaxial to Fiber
● Fiber to Coaxial

Question 15

Intrusion prevention system
(IPS)/intrusion detection
system (IDS) device

Answer 15

▪ IDS recognizes attacks through signatures and anomalies
▪ IPS recognizes and responds
▪ Host or network-based devices

Question 16

Firewall

Answer 16

▪ Network security appliance at your boundary
▪ Firewalls can be software or hardware
▪ Stateful firewalls
● Allows traffic that originates from inside the network and go out
to the Internet
● Blocks traffic originated from the Internet from getting into the
network

Question 17

VPN headend

Answer 17

A specific type of VPN concentrator used to terminate IPSec VPN tunnels
within a router or other device

Question 18

Voice over Internet
Protocol (VoIP) phone

Answer 18

▪ Digitizes voice traffic so that it can be treated like other data on the
network
▪ Uses the SIP (Session Initiation Protocol) to setup, maintain, and tear
down calls

Question 19

Internet of Things (IoT)

Answer 19

• Refrigerator
• Smart speakers
• Smart thermostats
• Smart doorbells

Question 20

Industrial control systems/
supervisory control and
data acquisition (SCADA)

Answer 20

Acquires and transmits data from different systems to a central panel for monitoring and control