Chapter 5 Networking Essentials

Instant Messaging

Answer explanation

Which communication tool allows multiple users to communicate with each other in real time by using a smartphone application or a social media site?

25, 143, and 110

Answer explanation

Traffic with these port numbers suggest users are sending and receiving emails on your network.

SSH provides secure communications to access hosts.

Answer explanation

What is the advantage of using SSH over Telnet?

nslookup

Answer explanation

This command line utility can be utilized to troubleshoot issues with DNS.

TCP

Answer explanation

Which OSI layer 4 protocol is like registered mail in the sense that it tracks the delivery of messages and gives confirmation of their delivery or asks for them to be re-sent?

Transport

Answer explanation

At which layer of the TCP/IP model does TCP operate?

Socket

Answer explanation

The combination of the port numbers and IP addresses that identify a specific conversation between two devices on a network is referred to as what?

UDP

Answer explanation

What is a "best effort" protocol well suited for streaming audio and VoIP?

Server

Answer explanation

Host that runs software to provide information, such as web content, to other hosts.

1-1023

Answer explanation

Well-known ports