CompTIA 15,16,17

What type of device is used to transfer packets between different networks?

• A hub

• A switch

• A router

• A Network Interface Card (NIC)

Answer explanation

A router is used to transfer packets between different networks by determining the best path for the data to travel, based on the destination address.

What is a Wide Area Network (WAN)?

• A network that connects sites in different geographic locations

• A network in a single location

• A company that specializes in providing Internet access

• A company that operates the national telephone networks

Answer explanation

A Wide Area Network (WAN) is a network that connects sites in different geographic locations, allowing communication over a large distance.

What is the difference between HTTP and HTTPS protocols?

• HTTPS serves SSL (Secure Sockets Layer) secured HTML web pages, whereas HTTP serves unsecured web pages.

• HTTP serves web pages on the extranet, whereas HTTPS serves web pages on the intranet.

• HTTP does not require DNS to resolve a web address to an IP address, whereas HTTPS does.

• HTTP can serve HTML web pages, whereas HTTPS can serve HTML web pages, as well as XML pages displayed as HTML.

Answer explanation

HTTPS serves SSL (Secure Sockets Layer) secured HTML web pages, whereas HTTP serves unsecured web pages.

What is a packet made up of?

• A packet is the destination address of a unit of data being transmitted over the network.

• A packet is the data inside the wrapper used for each data unit transmitted over the network.

• A packet consists of a number of fields contained within a header section plus a payload.

• A packet consists of a payload wrapped around a header section.

Answer explanation

A packet consists of a number of fields contained within a header section plus a payload, making it the correct choice.

What type of address identifies a network interface in the context of the local network segment only?

• A Media Access Control (MAC) address

• IP address

• DNS

• URL

Answer explanation

A Media Access Control (MAC) address is the type of address that identifies a network interface in the context of the local network segment only.

Which email protocol(s) are used to download messages from a mail server?

• Either Internet Message Access Protocol (IMAP) or Simple Mail Transfer Protocol (SMTP)

• Either Post Office Protocol (POP) or Mail Exchanger (MX)

• Either Mail Exchanger (MX) or Internet Message Access Protocol (IMAP)

• Either Post Office Protocol (POP) or Internet Message Access Protocol (IMAP)

Answer explanation

The correct answer is either Post Office Protocol (POP) or Internet Message Access Protocol (IMAP) as they are used to download messages from a mail server.

Which of the following parts of a friendly URL is dependent on a name resolution service?

• File path

• Protocol type

• Top level domain

• IP address

Answer explanation

The correct choice, 'Top level domain,' is dependent on a name resolution service to map the domain name to an IP address.

What is the latest Wi-Fi standard and which frequency band(s) does it use?

• IEEE 802.11ac works in the 5 GHz band.

• IEEE 802.11n works in the 5 GHz band.

• IEEE 802.11b works in the 5 GHz band.

• IEEE 802.11g works in the 2.4 GHz band.

Answer explanation

IEEE 802.11ac is the latest Wi-Fi standard and works in the 5 GHz band, making it the correct choice.

What is the difference between a modem and a router?

• The modem forwards packets between the local network and the Internet while the router transmits frames across the WAN link

• The modem transmits frames across the WAN link while the router forwards packets between the local network and the Internet.

• The modem and the router have exactly the same responsibilities, so the terms are often used interchangeably.

• The modem transmits frames across the WAN link while the router translates the server's web address into an IP address.

Answer explanation

The correct choice highlights that the modem transmits frames across the WAN link, while the router forwards packets between the local network and the Internet.

What device is used to connect computers together in an Ethernet network?

• An access point

• A switch

• Internet router

• Internet modem

Answer explanation

A switch is used to connect computers together in an Ethernet network by creating a network of multiple devices and allowing them to communicate with each other efficiently.