Which of the following automation and configuration management platforms are agentless and use SSH or WinRM as connection/control mechanisms.

Which of the following automation and configuration management platforms are agentless and use SSH or WinRM as connection/control mechanisms.

• Chef
• Ansible
• PepperStack
• Puppet

 

EXPLANATION

Additional links provided below:

• Puppet and Chef use agents installed on the node to communicate with the server.
• PepperStack is a fake name for SaltStack which is another agentless configuration management platform.
• Ansible uses agentless communication through SSH to control devices ranging from Linux servers to Cisco switches. It uses WinRM to communicate with Windows clients and servers.

SSH
https://docs.ansible.com/ansible/latest/user_guide/intro_getting_started.html
WinRM
https://docs.ansible.com/ansible/latest/user_guide/windows_winrm.html?highlight=winrm
Network Automation
https://docs.ansible.com/ansible/latest/network/index.html

SOURCE

https://www.gspann.com/resources/blogs/puppet-vs-chef-vs-ansible

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What is the purpose of a "Display Server"?

What is the purpose of a "Display Server"?

• To display the I/O logs and communication links between other servers within an infrastructure
• To assist with graphical designers working from low-end devices remotely
• To coordinate the I/O of its clients to and from the rest of the OS, hardware and each other
• To watch movies on during quiet time in an office 

 

EXPLANATION

A display server or window server is a program whose primary task is to coordinate the input and output of its clients to and from the rest of the operating system, the hardware, and each other.

SOURCE

https://en.wikipedia.org/wiki/Display_server

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Which of the following is the port used for POP3 SSL Traffic?

Which of the following is the port used for POP3 SSL Traffic?

• 587
• 995
• 25
• 110

EXPLANATION

POP uses port 110, but SSL/TLS encrypted POP uses port 995.

SOURCE

https://www.fastmail.com/help/technical/ssltlsstarttls.html

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Which benefit of being joined to a domain is not natively shared by Apple Macintosh computers?

Which benefit of being joined to a domain is not natively shared by Apple Macintosh computers?

• Group Policy
• Password Policy Enforcement
• Single Sign-On
• Windows Home Folders 

 

EXPLANATION

A domain-joined Mac workstation allows users to enjoy the following privileges:

• Kerberos authentication and delegation, including Single Sign-On to local, AD, and Open Directory resources
• AD password policy enforcement
• Support for AD user and group accounts
• Windows home folders

Of course, Mac computers do not have a Windows Registry and so therefore cannot be managed natively by Group Policy (the password policy issue previously mentioned is a notable exception).

SOURCE

https://4sysops.com/archives/how-to-join-a-mac-os-x-computer-to-active-directory/

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Which of the following is not part of a healthy virtualization implementation?

Which of the following is not part of a healthy virtualization implementation?

• An efficient DR plan
• Low hardware utilization
• High availability
• Backups 

EXPLANATION

The biggest issue of on-premises data centers, which have dedicated servers for each workflow, is very low hardware utilization. Companies simply can’t afford to run out of server capacity because their line-of-business (LOB) applications will work slowly or even stop, which is going to impact their revenues, so they oversize their hardware. Resource utilization of such servers is usually below 20% — they are not used at their full potential.
A healthy hypervisor implementation should have high availability (can be done by host clustering), backups (can be done by a variety of backup/replication software) and an efficient DR plan.

SOURCE

https://hyperv.veeam.com/blog/how-to-get-benefits-with-hyper-v-virtualization/

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Which file format should you only compress using lossless compression?

Which file format should you only compress using lossless compression?

• .MP4
• .TXT
• .MP3
• .JPEG 

 EXPLANATION

.TXT can only use  lossless compression, .JPEG, MP3 and MP4 are examples of media files which can be compressed with either lossy or lossless compression, but best compressed with higher compression given by lossy compression algorithms.
Compression algorithms are either lossy or lossless.
Lossy compression can compress a file more by modifying the original information into a more compression friendly version.  Thus lossy compression produces a similar file to the source file when uncompressed, but not the same, while lossless compression produces the same file as the source file when uncompressed.
Due to it's higher compression Lossy compression is typically used to compress multimedia data such as audio, video, and images. https://en.wikipedia.org/wiki/Lossy_compressio

Lossless compression is required for files that need to retain original data integrity when uncompressed, such as documents, spreadsheets, databases and text .TXT.
https://en.wikipedia.org/wiki/Lossless_compression

SOURCE

https://en.wikipedia.org/wiki/Lossless_compression

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