IT Fundamentals Review Units 15-22 Highlights

What is an internet service provider (ISP)?

• A company that operates national telephone networks

• A company that creates phone and web apps

• A company that build cellular towers

• A company that specializes in providing internet access

In packet switching, if some packets are lost or damaged during transmission, it’s more difficult to resend the lost packets than to resend the whole message.

• True

• False

What protocol is used to resolve a host's local Media Access Control (MAC) address to a logical IP address?

• Address resolution protocol (ARP)

• Internet protocol (IP)

• Internet control message protocol (ICMP)

• Transmission control protocol (TCP)

What protocol provides connection-oriented delivery at the transport layer of the TCP/IP protocol, ensuring that the delivery is reliable and packets are delivered in the right sequence?

• Address resolution protocol (ARP)

• Internet protocol (IP)

• Internet control message protocol (ICMP)

• Transmission control protocol (TCP)

What type of address is used to identify each device on a given network using a 32-bit or 128-bit binary value?

• Media access control (MAC) address

• IP address

• Domain name system (DNS)

• Uniform resource locator (URL)

Which term refers to a web address that contains all information needed by a browser to locate an item, like a web page or a file, on the web rather than on a device?

• Media access control (MAC) address

• IP address

• Domain name system (DNS)

• Uniform resource locator (URL)

A media access control (MAC) address is assigned to a device’s network adapter by the internet service provider every time the device accesses a network.

• True

• False

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

• A hub

• A switch

• A router

• A network interface card

What convention identifies each device on a given network using a 32-bit binary value expressed as four decimal numbers separated by periods (in version 4 of the relevant protocol)?

• URL

• IP address

• MAC address

• Domain name system

In SSL/TLS, a trusted certificate authority assigns a server a digital certificate that proves the server’s identity, assuming the client trusts the certificate authority.

• True

• False