What's another name for Wi-Fi?

What's another name for Wi-Fi?

• THX 1138
• 801.12 networking
• 801.22 networking
• 802.11 networking 

EXPLANATION

 802.11 Standards Explained: 802.11ac, 802.11b/g/n, 802.11a
Home and business owners looking to buy networking gear face an array of choices. Many products conform to the 802.11a, 802.11b/g/n, and/or 802.11ac wireless standards collectively known as Wi-Fi technologies. Bluetooth and various other wireless (but not Wi-Fi) technologies also permeate the market, each designed for specific networking applications.

For quick reference, 801.11aj is the most recently approved standard. The protocol was approved in May 2018. Just because a standard is approved, however, does not mean it is available to you or that it is the standard you need for your particular situation. Standards are always being updated, much like the way software is updated in a smartphone or on your computer. 

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Which of the following refers to wireless devices involved in connecting devices in close proximity to exchange data or resources?

Which of the following refers to wireless devices involved in connecting devices in close proximity to exchange data or resources?

• CAN
• MPLAN
• WPAN
• WAN 

EXPLANATION

A wireless personal area network (WPAN) is a type of personal network that uses wireless communication technologies to communicate and transfer data between the user's connected devices.

 A wireless network defined by personal operating space (POS), which simply is the area in the near vicinity of a device or individual. 802.15 is the IEEE specification for WPANs and 802.15.1 is the specification for Bluetooth.

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An IP address of 130.3.3.3 falls into which class?

An IP address of 130.3.3.3 falls into which class?

• Class C
• Class A
• Class D
• Class B 

EXPLANATION

 

Note: Class A addresses 127.0.0.0 to 127.255.255.255 cannot be used and is reserved for loopback and diagnostic functions.

Private IP Addresses

Class	Private Networks	Subnet Mask	Address Range
A	10.0.0.0	255.0.0.0	10.0.0.0 - 10.255.255.255
B	172.16.0.0 - 172.31.0.0	255.240.0.0	172.16.0.0 - 172.31.255.255
C	192.168.0.0	255.255.0.0	192.168.0.0 - 192.168.255.255

Class	1st Octet Decimal Range	1st Octet High Order Bits	Network/Host ID (N=Network, H=Host)	Default Subnet Mask	Number of Networks	Hosts per Network (Usable Addresses)
A	1 – 126*	0	N.H.H.H	255.0.0.0	126 (27 – 2)	16,777,214 (224 – 2)
B	128 – 191	10	N.N.H.H	255.255.0.0	16,382 (214 – 2)	65,534 (216 – 2)
C	192 – 223	110	N.N.N.H	255.255.255.0	2,097,150 (221 – 2)	254 (28 – 2)
D	224 – 239	1110	Reserved for Multicasting
E	240 – 254	1111	Experimental; used for research

 

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Which type of RAID implements disk striping with distributed parity?

Which type of RAID implements disk striping with distributed parity?

• RAID 5
• RAID 0
• RAID 1
• RAID 10 

 

EXPLANATION

  Following are the key points to remember for RAID level 5.

• Minimum 3 disks.
• Good performance ( as blocks are striped ).
• Good redundancy ( distributed parity ).
• Best cost effective option providing both performance and redundancy. Use this for DB that is heavily read oriented. Write operations will be slow.

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Why would you change the default channel on a wireless access point?

Why would you change the default channel on a wireless access point?

• To release the SSID
• To decrease WEP security settings
• If channel overlap occurs between access points [Please report iif the answer is incorrect]
• To increase WEP security settings

EXPLANATION

 

One reason your wireless network may have poor Wi-Fi signal is because of interference caused by other devices. Since most wireless home networks transmit their signals in a narrow radio frequency range around 2.4 GHz, it's common for devices on the same frequency to affect the wireless signal.

Other electronics in a home, like cordless phones, garage door openers, baby monitors, and microwave ovens, may also use this same frequency range. Any such device can easily interfere with a wireless home network, slowing down its performance and potentially breaking network connections.
One reason your wireless network may have poor Wi-Fi signal is because of interference caused by other devices. Since most wireless home networks transmit their signals in a narrow radio frequency range around 2.4 GHz, it's common for devices on the same frequency to affect the wireless signal. Other electronics in a home, like cordless phones, garage door openers, baby monitors, and microwave ovens, may also use this same frequency range. Any such device can easily interfere with a wireless home network, slowing down its performance and potentially breaking network connections. Likewise, the wireless networks of neighbors generally all use the same form of radio signaling. Especially in residences that share walls with each other, interference between different home networks is not uncommon. Fortunately, most routers give you the option to change the wireless channel so they can communicate on a different frequency to avoid interference.

Likewise, the wireless networks of neighbors generally all use the same form of radio signaling. Especially in residences that share walls with each other, interference between different home networks is not uncommon.

Fortunately, most routers give you the option to change the wireless channel so they can communicate on a different frequency to avoid interference.

 https://community.spiceworks.com/topic/125991-mulitple-wireless-access-points-same-channel-or-different

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Using the command prompt, what Active Directory command adds a user?

Using the command prompt, what Active Directory command adds a user?

• -ad user
• dsadd user
• add-user user
• AddUser user 

EXPLANATION

Adding a new user with the dsadd command is a little easier than with PowerShell, as we don’t need to convert the password to a secure string. Open a PowerShell prompt or command prompt, type the command below and press ENTER. To open a PowerShell prompt, click the blue PowerShell icon on the desktop taskbar, or click the Windows PowerShell tile on the Start screen. It doesn’t matter that dsadd is not a PowerShell cmdlet, it can still be run from a PowerShell window.

dsadd user “cn=Russell Smith,cn=Users,dc=ad,dc=contoso,dc=com” -samid russellsmith -upn russellsmith@ad.contoso.com -fn Russell -ln Smith -display “Russell Smith” -disabled no -pwd “PassW0rd!” -mustchpwd yes

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Which Active Directory folder contains login scripts?

Which Active Directory folder contains login scripts?

• SYSVOL
• System32
• Sciripts
• Schema 

EXPLANATION

 In Microsoft Windows, the System Volume (Sysvol) is a shared directory that stores the server copy of the domain's public files that must be shared for common access and replication throughout a domain. The term SYSVOL refers to a set of files and folders that reside on the local hard disk of each domain controller in a domain and that are replicated by the File Replication service (FRS). Network clients access the contents of the SYSVOL tree by using the NETLOGON and SYSVOL shared folders. Sysvol uses junction points-a physical location on a hard disk that points to data that is located elsewhere on your disk or other storage device-to manage a single instance store.

The System Volume (Sysvol) is a shared directory that stores the server copy of the domain's public files that must be shared for common access and replication throughout a domain. The Sysvol folder on a domain controller contains the following items:

• Net Logon shares. These typically host logon scripts and policy objects for network client computers.
• User logon scripts for domains where the administrator uses Active Directory Users and Computers.
• Windows Group Policy.
• File replication service (FRS) staging folder and files that must be available and synchronized between domain controllers.
• File system junctions.

File system junctions are used extensively in the Sysvol structure and are a feature of NTFS file system 3.0. You must be aware of the existence of junction points and how they operate so that you can avoid data loss or corruption that may occur if you modify the Sysvol structure.

 

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