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

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? TFTP Kerberos NTP DHCP

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

What does DHCP do? DHCP assigns IP addresses to computers on a network. DHCP keeps the clock synchronized on machines connected to a network. DHCP sets up an authoritative DNS server a network, DHCP maps domain names to IP addresses.

DHCP assigns IP addresses to computers on a network.

Which of the following is an advantage of using DHCP?

DHCP leases IP addresses, removing the need to manually assign addresses.

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

DNS You can use DNS to point a domain name to a web server or use hostnames within your company.

You are the sole IT professional at your company, and you need to know how many users or computers are in your organization. Which of the following services helps manage users in your company? Physical infrastructure services Network services Platform services Directory services

Directory services

What happens when you virtualize a server? It puts many instances on a single physical server. It provides access to software maintained on the cloud It provides remote access to other computers in another part of the world It keeps all the machines on a network synchronized

It puts many instances on a single physical server.

The boss at your company wants a way to block certain websites from employees. As the sole IT professional at the company, what can you set up to help with this request? An Intranet A Proxy server DNS FTP

Proxy server

In Linux, the most popular remote access tool is OpenSSH. Which software performs the same remote command line (CLI) access from a Window machine? Check all that apply. Microsoft Azure WinRM RDP PuTTY

PuTTY PuTTY is a handy Windows tool that lets you access a command line remotely using SSH. WinRM *Windows Remote Management (WinRM) allows remote access to the command prompt using WS-Management Protocol.

Which of the following file transfer protocols is the most secure? TFTP NTP SFTP FTP

SFTP

If you wanted to securely transfer files from your local machine to a web server, what file transfer protocol could you use? FTP TFTP SFTP NTP

SFTP SFTP is the file transfer protocol that encrypts data.

A network service developer is looking to install the most secure file transfer protocol. Which protocol would best fit this criteria? TFTP FTP NTP SFTP

SFTP SFTP stands for Secure File Transfer Protocol It is more secure than the unsecured FTP or TFTP

Which one of the following options allows you access a system remotely? Check all that apply. NTP Server SSH VPN

SSH VPN

Let's say that you're the sole IT person at your company. The company is a very small startup, and they need to set up a few non-critical services and have a single physical server in place. What is the best approach to fully utilize this server? Partition the hard drive on the server. Set up virtualized servers on the server. Purchase a service from an laas provider. Use the server for a single service and don't worry about the other services.

Set up virtualized servers on the server.

What is one benefit of using TFTP over SFTP? Added security Simpler transfer without authentication The encrypted transfer of data The user authentication requirement

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.

Google's GSuite is an example of which Cloud service? Directory as a Service Infrastructure as a Service (IaaS) Software as a Service (SaaS) Platform as a Service (PaaS)

Software as a Service (SaaS) Software as a Service (SaaS) is a neat Cloud product that gives users the ability to edit word documents, process spreadsheets, make presentations, and more, all from a web browser. This simplifies things for you, with less to install and manage.

Which of the following is a simple transfer protocol often used to host installation files?

TFTP

A sysadmin is looking to use Pre-Boot Execution over a network by keeping operating system installation files on a server. Which type of server is this most likely to be? DNS server FTP server SFTP server TFTP server

TFTP server TFTP stands for trivial FTP. It's a simpler way to transfer files than using FTP and is often used to host installation files.

If you want to integrate your DHCP server with DNS, which of the following information will you need to configure DHCP? A domain name The Gateway you should assign. The address of your local DNS servers. The subnet mask that gets used.

The Gateway you should assign. The address of your local DNS servers. The subnet mask that gets used.

Which of the following are cons that come from using a Cloud Service? Select all that apply.

The need to depend on a provider for a service.

Using virtualization comes with many advantages, one of them being performance. Which of these is NOT another realistic advantage of using virtualization over dedicated hardware? There are cost benefits There are improvements in security and high availability during outage. Maintenance and updates are simplified or eliminated There are fewer points of failure

There are improvements in security and high availability during outage.

If you're running a server, which one of the follow operating systems would be best suited for your server? Windows 10 Ubuntu Server MacOS Ubuntu

Ubuntu Server

A website is inaccessible via its URL. You've pinged the site and see no problem there. What is the next troubleshooting step? Use nslookup in the terminal to rule out DNS issues Turn the device off and on again Access host file and check for inconsistencies Ping localhost

Use nslookup in the terminal to rule out DNS issues. Right ont We can rule out if DNS is an issue by verifying that the hostname points to a name server If we copy the IP address of the results and paste it into the web browser, it should resolve the website name if the DNS is working

Which of these is considered a network service? Check all that apply. Wireless Internet DNS Blade server Ethernet cables

Wireless Internet DNS Ethernet cables

What are the advantages of using Infrastructure as a Service (or IaaS) solutions? Check all that apply.

You can have the hardware you need without upgrading any actual hardware. You're not responsible for managing hardware tasks. Operating system updates are taken care of for you.

When running a server, it's best to use a server operating system that's been specifically optimized for server performance. What are the benefits of virtualizing servers? Check all that apply. Better hardware resource utilization Easier maintenance Lower costs Better performance than a dedicated server

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

What is a type of tool a client could use to access a server and transfer files?

An FTP client

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 A VPN connection An SSH server on the machine you want to connect to A virtual server to connect to

An SSH client on the machine you want to connect from An SSH server on the machine you want to connect to. 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.

You are setting up a website for your company. You have purchased a domain name for the site and have decided to host your web content yourself. What might you need to set up to point your new domain name to where web content is located?

An authoritative DNS server.

Which of the following best describes an intranet? An intranet is a type of file transfer protocol An intranet is used to host a company's internal websites and resources. The intranet is a service that provides access to pre-configured machines for a fee. An intranet is a single server with many virtual instances on it

An intranet is used to host a company's internal websites and resources.

Which of the following are reasons for using DNS? Select all that apply.

It maps names humans can understand to IP addresses. It maps local addresses to simple names without editing host files.

Which of these is considered a software service? Check all that apply. Chat applications Word processors Email applications Wireless Internet

Chat applications Word processors Email applications

A network technician is unable to resolve a domain name. What is the first step the technician should take to troubleshoot the problem?

Check that the network connection is working.

If we want to access files located in a directory on a remote server, which of these options would we use? VNC client NTP server DNS server FTP client

FTP client

Which of the benefits below make using an Infrastructure as a Service (IaaS) provider a better option than purchasing dedicated physical hardware? Check all that apply. Having low initial costs IaaS providers have lower startup costs than buying dedicated hardware and are generally easier to manage. Using a server for a short amount of time Not needing to manage physical servers IaaS providers have lower startup costs than buying dedicated hardware and are generally easier to manage. Having complete control over your physical infrastructure

Having low initial costs IaaS providers have lower startup costs than buying dedicated hardware and are generally easier to manage. Using a server for a short amount of time Not needing to manage physical servers IaaS providers have lower startup costs than buying dedicated hardware and are generally easier to manage. Having complete control over your physical infrastructure

Which of the benefits below make using an Infrastructure as a Service (IaaS) provider a better option than purchasing dedicated physical hardware? Check all that apply. Having low initial costs Using a server for a short amount of time Not needing to manage physical servers Having complete control over your physical infrastructure

Having low initial costs IaaS providers have lower startup costs than buying dedicated hardware and are generally easier to manage. Using a server for a short amount of time Not needing to manage physical servers IaaS providers have lower startup costs than buying dedicated hardware and are generally easier to manage. Having low initial costs Using a server for a short amount of time Not needing to manage physical servers

Which service gives access to pre-configured virtual machines that can be used like physical servers? PaaS Saas laas Daas

IaaS

Amazon Web Services, Linode, Windows Azure, and Google Compute Engine are examples of _________________________________.

IaaS Providers

What are some reasons DNS is necessary? Check all that apply. It simplifies remote access. It maps local addresses to simple names without editing hosts files. It improves network throughput. It makes Internet website IP addresses accessible with human readable domain names.

It simplifies remote access. Remote access is much easier when human readable names of network locations are mapped to their addresses. It maps local addresses to simple names without editing hosts files. DNS is what maps human understandable names to IP addresses. If you don't set it up correctly, no one will be able to access websites by their names It makes Internet website IP addresses accessible with human readable domain names. Without DNS, we'd have to type in full IP addresses to access the websites we want to use.

Which of the following is considered a physical infrastructure service? Check all that apply. Laptop Desktop Rack server Operating systems

Laptop Desktop Rack server

What is the main advantage of using DHCP? Allows usage of static IP addresses Allows you to manually set IP addresses Leases IP addresses, removing the need to manually assign addresses Maps IP addresses to human readable URLs

Leases IP addresses, removing the need to manually assign addresses If you enable DHCP, your computers will be leased an IP address from a DHCPserver. They'll automatically get IP addresses, and you don't have to worry about manually setting addresses. It's automatic!

A network technician sets up an internal DNS server for his local network. When he types in a URL, which is checked first? External public DNS servers Local hosts file Local DNS servers External ISP DNS servers

Local hosts file

Which of the following is a benefit of virtualization compared to using dedicated hardware? Security User experience Maintenance Performance

Maintenance

Which are advantages of using a server operating system? Simplified user interface Extra security features and networking services built right in More RAM and storage capacity More network connections

More network connections Server operating systems are regular operating systems that are optimized for server functionality. This includes functions like allowing more network connections. More RAM and storage capacity Extra security features and networking services built right in Server operating systems are usually more secure and can come with additional services, such as security, already built in, so you don't have to set up these services separately.

As an IT systems administrator, what can you set up to make sure that your client machines and server times are in sync? A: FTP An Intranet A proxy NTP

NTP

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

NTP

Which of the following is not a network file transfer protocol? SFTP FTP NTP TFTP

NTP

Let's say that you handle the IT systems administration for your company. There's a server inside of your organization that checks how often client machines access it. If a client machine hasn't accessed the server in three months, the server won't allow the client machine to access its resources anymore. What can you set to make sure that your client machines and the server times are in sync? FTP NTP Proxy Intranet

NTP NTP is commonly used in organizations to keep time synchronized across machines in a fleet.

What features does a proxy offer? Check all that apply. Network privacy Network traffic monitoring Internet traffic filtering The ability for employees to share information more easily

Network privacy Network traffic monitoring Internet traffic filtering 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.

You want to access the CLI [command line interface] of a Linux terminal at work from your Apple laptop at home. You have the proper client installed on your laptop. What needs to be installed on the remote Linux machine? RDP OpenSSH Putty WinRM

OpenSSH Nice job! in Linus, the most popular remote access tool is OpenSSH. To SSH another machine you need to install an SSH Client on the machine you're connecting from, then install an SSH server on the machine you're connecting to.

What type of cloud service allows app developers to build code, store information in a database, and serve their applications from a single place? Daas Paas Saas Iaas

PaaS

An app developer is shopping for a cloudservice that will allow him to build code,store information in a database and serve hisapplication from a single place. What type ofcloud service is he looking for? SaaS (Software as a Service) IaaS (Infrastructure as a Service) DaaS (Directory as a Service) PaaS (Platform as a Service)

PaaS (Platform as a Service) Platform as a Service or PaaS includes an entire platform that allows you to build code, store information in a database and serve your application from a single place.

Which of the following is a potential negative (con) of virtualization compared to using dedicated hardware?

Performance

What does PXE Boot stand for? Pay-to-Boot Extortion Post Boot Extraction Past Boot Examination Pre-Boot Execution

Pre-Boot Execution PXE Boot stands for Pre-Boot Execution. This allows you to boot into software that's available over the network.

What are the advantages of using Infrastructure as a Service (or IaaS) solutions? Check all that apply. You can keep all your files on local machines. *You're not responsible for managing hardware tasks. Operating system updates are taken care of for you. You can have the hardware you need without upgrading any actual hardware.

You're not responsible for managing hardware tasks. Infrastructure as a Service (IaaS) solutions, such as Microsoft's Azure or our very own Google Compute Engine, give us the ability to run Virtual Machines (VMs) on remote hardware. This means less fiddling with hardware and more productivity! Operating system updates are taken care of for you. When using Infrastructure as a Service, system software updates are taken care of for you! You can have the hardware you need without upgrading any actual hardware. Simply upgrade your plan by utilizing more computing resources, and you can have all the resources your business needs.

When you make a DNS query, where does your computer first check to find an IP address to name mapping? ISP DNS servers Your local machine Root servers Top-level domains

Your local machine When you do a DNS query, your computer first checks locally, in a file like/etc/hosts, to find local DNS mappings.