System Administration and IT Infrastructure Services. Week 2: Network and Infrastructure Services

Which of the following do you need in order to SSH to a machine? Check all that apply.

An SSH client on the machine you want to connect from; To make an SSH connection from one machine to another, you need to have an SSH client on the machine you want to connect from, along with an SSH server on the machine you want to connect to. An SSH server on the machine you want to connect to

What are the benefits of virtualizing servers? Check all that apply

Better hardware resource utilization; Virtualizing servers offer lots of benefits, like enabling hardware to be better utilized, easier to maintain, and generally lower in cost. easier maintenance lower costs

If you don't want to use static IP addresses, but want to dynamically assign IP addresses to computers instead, what network protocol can you use?

DHCP; You can use DHCP to dynamically assign IP addresses to computers.

What is one benefit of using TFTP over SFTP?

Simpler transfer without authentication; TFTP allows for a simpler transfer of files without having to authenticate. If you wanted to host something that anyone could access, you could use TFTP over SFTP.

Which of these is considered a software service? Check all that apply.

chat applications; Software services are comprised of the software that an organization uses in its IT environment. word processors email applications

What features does a proxy offer? Check all that apply.

network privacy; A proxy acts as an intermediary between your company and the Internet. Because of that, you have network privacy and can monitor and filter network traffic. network traffic monitoring internet traffic filtering

If you want to point a domain name to a web server or use hostnames within your company, what network protocol can you use? DHCP DNS NTP SFTP

SFTP; Not quite. There's a network protocol that maps IP addresses to hostnames. Please refer back to Lessons 9-11 on DNS for a refresher.

If you're running a server, which one of the follow operating systems would be best suited for your server?

Ubuntu Server; When running a server, it's best to use a server operating system that's been specifically optimized for server performance.

Which of the following is considered a physical infrastructure service? Check all that apply.

laptop; Physical infrastructure services are comprised of the physical hardware that an organization uses in their IT environment. desktop rack server

Which of these is considered a network service? Check all that apply.

wireless internet; Network services are comprised of networking components that an organization uses in their IT environment, like network protocols, network hardware, etc. DNS Ethernet cables

What service can you use to keep time synchronized across the machines on your fleet?

NTP; NTP, or network time protocol, is used to keep time synchronized across machines.