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Friday, April 19, 2019

How much native data you can store on a LTO-8 tape

How much native data you can store on a LTO-8 tape
  • 24000 GB
  • 12800 GB
  • 12000 GB
  • 25600 GB


EXPLANATION

LTO-8 offers a compressed storage capacity of 30TB (12TB native) using a 2.5:1 ratio, and a compressed transfer rate of 750 MB/sec. (360MB/sec. native). In addition, the new LTO-8 drives are backward compatible with LTO-7 tape media, allowing users to read/write any LTO-7 media. LTO-8 tape, like LTO-7, supports LTFS, WORM (Write Once Read Many) and AES 256-bit hardware encryption.

SOURCE

https://spectralogic.com/features/lto-8/
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What does SMTP stand for


What does SMTP stand for
  • Simple Mail Transfer Protocol
  • Smack Toilet Paper
  • RAAAAAAAAAAAR!
  • Small Mail Telemetry Pass

What does SMTP stand for


EXPLANATION

SMTP stands for Simple Mail Transfer Protocol. This is the generally accepted protocol. for outgoing e-mail. Use of SMTP. SMTP service is the side of e-mail that allows clients to send outgoing e-mail messages. to any valid e-mail address.

SMTP, is a protocol used to transmit email messages over the internet. The standard itself was first published in 1981, and it has been improved continuously to adapt to changes in technology and user needs


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All of these are general ports used for email except which one?

All of these are general ports used for email except which one?
  • 25
  • 22
  • 587
  • 110           

All of these are general ports used for email except which one?

EXPLANATION

Common port numbers
The Internet Assigned Numbers Authority (IANA) is responsible for the global coordination of the DNS Root, IP addressing, and other Internet protocol resources. This includes the registration of commonly used port numbers for well-known Internet services.
The port numbers are divided into three ranges: the well-known ports, the registered ports, and the dynamic or private ports.
The well-known ports (also known as system ports) are those from 0 through 1023. The requirements for new assignments in this range are stricter than for other registrations, examples include:
The registered ports are those from 1024 through 49151. IANA maintains the official list of well-known and registered ranges. The dynamic or private ports are those from 49152 through 65535. One common use for this range is for ephemeral ports

SOURCE

https://en.wikipedia.org/wiki/Port_(computer_networking)

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what protocol should be used to send a password securely

what protocol should be used to send a password securely
  • ftp
  • smtp
  • telnet
  • ssh   
    
what protocol should be used to send a password securely

 EXPLANATION


File Transfer Protocol
The File Transfer Protocol is a standard network protocol used for the transfer of computer files between a client and server on a computer network. FTP is on Port 21.

Secure Shell
Secure Shell is a cryptographic network protocol for operating network services securely over an unsecured network. The best known example application is for remote login to computer systems by users.Secure Shell (SSH) uses TCP port 22.

telnet 
Telnet is a protocol used on the Internet or local area network to provide a bidirectional interactive text-oriented communication facility using a virtual terminal connection. Wikipedia

simple mail transfer protocol
The Simple Mail Transfer Protocol is a communication protocol for electronic mail transmission. As an Internet standard, SMTP was first defined in 1982 by RFC 821, and updated in 2008 by RFC 5321 to Extended SMTP additions, which is the protocol variety in widespread use today. Wikipedia
Standard port: 25, 587, 465

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Which of the following file replication methods is now used as a standard feature since Windows Vista and Windows Server 2008?

Which of the following file replication methods is now used as a standard feature since Windows Vista and Windows Server 2008?

  • fcopy
  • xcopy
  • Robocopy
  • Dfs 
Which of the following file replication methods is now used as a standard feature since Windows Vista and Windows Server 2008?

EXPLANATION

Distributed File System (DFS) is a set of client and server services that allow an organization using Microsoft Windows servers to organize many distributed SMB file shares into a distributed file system.
DFS has two components to its service: Location transparency (via the namespace component) and Redundancy (via the file replication component). Together, these components improve data availability in the case of failure or heavy load by allowing shares in multiple different locations to be logically grouped under one folder, the "DFS root".
Microsoft's DFS is referred to interchangeably as 'DFS' and 'Dfs' by Microsoft and is unrelated to the DCE Distributed File System, which held the 'DFS' trademark[1] but was discontinued in 2005.

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In a Windows environment, which command should you use in order to show the last time your machine was rebooted?

n a Windows environment, which command should you use in order to show the last time your machine was rebooted?

  • systeminfo | find "System Boot Time"
  • net stats workstation
  • uptime
  • systeminfo | find "System Uptime" 
n a Windows environment, which command should you use in order to show the last time your machine was rebooted?

EXPLANATION

systeminfo command is almost right what you need. On English Windows 7 you can also do:
systeminfo | find /i "Boot Time"
Or with the help of WMIC:


wmic os get lastbootuptime
The main difference between Windows 7 and Windows XP that in Windows 7 Microsoft can show only last boot up time. 






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What is the maxiumum distance for a CAT5E Cable?

What is the maxiumum distance for a CAT5E Cable?

  • 11 Meters
  • Infinite
  • 100 Meters
  • 30 Meters 
What is the maxiumum distance for a CAT5E Cable?

EXPLANATION

1000BASE-T (also known as IEEE 802.3ab) is a standard for gigabit Ethernet over copper wiring.

Each 1000BASE-T network segment can be a maximum length of 100 meters (328 feet), and must use Category 5 cable or better (including Cat 5e and Cat 6).

 The standards for Cat 5e and Cat 6 call for a maximum run length of 90 meters or 295 feet. While you may make a longer run and get it to work, this is not recommended. Even if problems don't show up immediately, they may come up later as your computers are upgraded to transmit faster or your network is expanded. If you must make a longer run, you can either put a signal repeater in the middle of the line or you can make your long run with fiber optic cable.
If your run is between 295 and 590 feet, the repeater option may be the best option for you. A switch or hub will act as a repeater. Make sure that you locate it in such a way that both runs on either side of the repeater are within the 90 meter standard. It won't do much good to split a 500 foot run into two runs of 100 and 400 feet.

If your run is longer than 590 feet or if most of the run is outside, fiber optic may be your best option. You'll need a media converter or fiber fed switch at each end of the fiber run to convert your network signals back and forth between electrical signals on copper and light pulses on fiber. If you are running fiber optic cable underground, you'll need to protect the delicate glass fibers inside the jacket by running it through a conduit or by using armored fiber optic cable.
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