IT Essentials v7.01 Chapter 5 Quiz Answers

1. What are two common media used in networks? (Choose two.)

  • copper
  • nylon
  • water
  • fiber
  • wood

Explanation: Common media used in networks include copper, glass or plastic optical fiber, and wireless.

2. Fill in the blank.
The technology that allows a switch to deliver power to a device like an IP phone or an access point through the data cable is known as PoE .

3. Which technology uses existing electrical wiring to connect devices to a network?

  • IPS
  • 802.11
  • Z-Wave
  • Ethernet over Power

Explanation: Ethernet over Power, or powerline networking, uses a device that attaches to a power outlet and a cable to connect a device to a network. IEEE 802.11 is a standard for wireless networks. An intrusion prevention system (IPS) is a security device that monitors all inbound and outbound traffic. Z-Wave is a type of network used in a smart home.

4. Which smart home technology requires the use of a device, known as a coordinator, to create a wireless PAN?

  • 802.11ac
  • 802.11n
  • Zigbee
  • Z-Wave

Explanation: The ZigBee Coordinator is a device that manages all the ZigBee client devices to create a ZigBee wireless personal-area network (PAN) using the 868 MHz to 2.4 GHz range.

5. Which security technology is used to passively monitor network traffic with the objective of detecting a possible attack?

  • IPS
  • IDS
  • proxy server
  • firewall

Explanation: An IDS system is implemented to passively monitor the traffic on a network. Both anIPSand a firewall actively monitor network traffic and take immediate actions when previously defined security criteria match. A proxy server, when it functions as a firewall, also actively monitors the traffic that travels through it and takes immediate actions.

6. Which two protocols operate at the transport layer of the TCP/IP model? (Choose two.)

  • UDP
  • ICMP
  • TCP
  • FTP
  • IP

Explanation: The TCP/IP model includes four layers. The application layer, the transport layer, the internet layer, and the network access layer. The functions at each layer include different protocols. The transport layer includes both the TCP and the UDP protocols.

7. Which network device regenerates the data signal without segmenting the network?

  • router
  • modem
  • switch
  • hub

Explanation: Hubs are sometimes called repeaters because they regenerate the signal. All devices connected to the hub share the same bandwidth (unlike a switch, which gives each device dedicated bandwidth).

8. A switch is a networking device that records ______ addresses by inspecting every incoming data frame.

  • IP
  • TCP/IP
  • MAC
  • SVI
  • switch

Explanation: A switch maintains a switching table that contains a list of available MAC addresses on the network. The switching table records MAC addresses by inspecting the source MAC address of every incoming frame.

9. A company is expanding its business to other countries. All branch offices must remain connected to corporate headquarters at all times. Which network technology is required to support this scenario?

  • LAN
  • MAN
  • WAN
  • WLAN

Explanation: A WAN connects multiple LANs that are in geographically separated locations. A MAN connects multiple LANs in a large campus or in a city. WLAN is a wireless LAN that covers a rather small geographic area.

10. Which network service automatically assigns IP addresses to devices on the network?

  • traceroute
  • DNS
  • DHCP
  • Telnet

Explanation: Dynamic Host Configuration Protocol (DHCP) can be used to allow end devices to automatically configure IP information, such as their IP address, subnet mask, DNS server, and default gateway. The DNS service is used to provide domain name resolution, mapping hostnames to IP addresses. Telnet is a method for remotely accessing a CLI session of a switch or router.Tracerouteis a command used to determine the path a packet takes as it traverses the network.

11. Which type of network will extend a short distance and connects printers, mice, and keyboards to an individual host?

  • PAN
  • LAN
  • MAN
  • WLAN

Explanation: A personal area network (PAN) connects devices, such as mice, keyboards, printers, smartphones, and tablets. These devices are often connected with Bluetooth technology. Bluetooth allows devices to communicate over short distances.

12. A technician has captured packets on a network that has been running slowly when accessing the internet. Which port number should the technician look for within the captured material to locate HTTP packets?

  • 20
  • 21
  • 53
  • 110
  • 80

Explanation: HTTP uses TCP port 80 and HTTPS uses TCP port 443. HTTP and HTTPS are protocols commonly used to access web pages.

13. Which three Wi-Fi standards operate in the 2.4GHz range of frequencies? (Choose three.)

  • 802.11n
  • 802.11ac
  • 802.11g
  • 802.11a
  • 802.11b

Explanation: 802.11b and 802.11g operate in the 2.4GHz range, and 802.11n can operate in either the 2.4GHz or the 5GHz range. 802.11a and 802.11ac operate only in the 5GHz range of frequencies.

14. A technician has been asked to assist with some LAN cabling. What are two standards that the technician should research before this project begins? (Choose two.)

  • Z-Wave
  • 802.11c
  • T568B
  • 802.11n
  • Zigbee
  • T568A

Explanation: T568A and T568B are wiring schemes used with Ethernet LAN cabling. IEEE 802.11n and 802.11ac are wireless LAN standards. Zigbee and Z-Wave are smart home standards.

15. Fill in the blank.
broadband technology uses different frequencies to transmit multiple signals simultaneously over the same cable.

Explanation: Broadband technology uses different frequencies, divided into different channels, to allow simultaneous transmission of multiple different signals on the same cable. DSL, cable, and satellite are examples of broadband network connections.

16. What type of networking cable do television companies use to carry data as electrical signals?

  • fiber optic
  • unshielded twisted-pair
  • shielded twisted-pair
  • coaxial

Explanation: Cable television companies and satellite communication systems both use copper or aluminum coaxial cable for connections between devices.


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