Networks and Security: Quiz 6

A set of rules used by two or more devices on a network to describe the order of delivery and structure of the data.

ne???? pr??????

? protocols govern the exchange of information in network transmission. They dictate how the data is transmitted between devices and the timing. They also include methods to recover data lost in transit.

• communications

• transmission control

• user datagram

• hypertext transfer

? is a connectionless protocol that does not establish a connection between devices before a transmission. This makes it less reliable than TCP. But it also means that it works well for transmissions that need to get to their destination quickly. For example, one use of UDP is for internet gaming transmissions. ? protocol occurs at the transport layer.

• communications

• transmission control

• user datagram

• hypertext transfer

? is an application layer protocol that provides a method of communication between clients and website servers. ? uses port 80. ? is considered insecure, so it is being replaced on most websites by a another version. However, there are still many websites that use the insecure ? protocol. In the TCP/IP model, ? occurs at the application layer.

• communications

• transmission control

• user datagram

• hypertext transfer

? is an internet communication protocol that allows two devices to form a connection and stream data. It uses a three-way handshake process. First, the device sends a synchronize (SYN) request to a server. Then the server responds with a SYN/ACK packet to acknowledge receipt of the device's request. Once the server receives the final ACK packet from the device, a connection is established.

• communications

• transmission control

• user datagram

• hypertext transfer

A network protocol that provides a secure method of communication between clients and website servers.

HTTPS

An internet communications protocol that allows two devices to from a connection and stream data.

TCP

A network protocol used to determine the MAC address of the next router or device on the path.

ARP

A network protocol that translates internet website names into IP addresses.

DNS

Even though network protocols perform an essential function in network communication, security analysts should still understand their associated security implications. Some protocols have vulnerabilities that malicious actors exploit. For example, a nefarious actor could use the ??? protocol, which resolves web addresses to IP addresses, to divert traffic from a legitimate website to a malicious website containing malware.