DHCP

#DHCP stands for Dynamic Host configuration protocol:-
It reduces the complexity and administrative task efforts by using automatic IP configuration. DHCP port number 67 for DHCP server and 68 for client.
There are 2 methods of IP assignment that is Manual IP configuration and Automatic IP configuration.

#Manual IP configuration versus Automatic IP configuration:-

• The administrator has to enter the IP address manually to each machine by machine. It is a tedious task example if your company has 200 PCs then it is practically not possible for desktop administrator. Automatic IP configuration using DHCP resolves this problem.
• Also Manual IP address could mismatch or it can be entered incorrectly, resulting into a network communication issues. DHCP ensure correct configuration information and the client configuration is updated automatically.
• If a computer is moved from one department to another department,it can be lead to change of the IP address and more administrative effort. by using DHCP the common network problem is eliminated.

#Working of DHCP Lease Process:- 

DHCP works on DORA process:-

D=Discover
O=Offer
R=Request
A=Acknowledge from DHCP server

#DHCP Process to allocate IP address to the client:-

An IP address is allocated or leased to a client machine by a DHCP server for a time period. For windows server 2012, the default lease period is 8 days. After 8 days the IP has to be renewed.

#Configuration of DHCP:-
DHCP Scope
DHCP Reservation
DHCP Option
DHCP Database
DHCP Lease process.
DHCP Renewal Process 

DHCP Relay Agent

step by step DHCP Server Installation:- 

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Windows 10 1903 Update

Microsoft has officially released Windows 10 May 2019 Update for the public. Also known as version 1903. You can Direct Download Windows 10 May 2019 Update from Update settings other wise you can update through windows update Assistant this is the Best way to update windows 10 1903.

So If you are ready to install the update, open your Windows Update settings 

(Settings > Update & Security > Windows Update) and select Check for updates. Once the update appears, you can select Download and install

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Most useful websites list

1.      goo.gl – shorten long URLs and convert URLs into QR codes.

2.     bing.com/images – automatically find perfectly-sized wallpapers for mobiles.

3.     boxoh.com – track the status of any shipment on Google Maps – alternative.

4.     bubbl.us – create mind-maps, brainstorm ideas in the browser.

5.     builtwith.com – find the technology stack to know everything about a website.

6.     codeacademy.com – the best place to learn coding online.

7.     copypastecharacter.com – copy special characters that aren’t on your keyboard.

8.     coralcdn.org – if a site is down due to heavy traffic, try accessing it through coral CDN.

9.     ctrlq.org/html-mail – send rich-text mails to anyone, anonymously.

10. ctrlq.org/screenshots – for capturing screenshots of web pages on mobile and desktops.

11. ctrlq.save – save online files to Dropbox or Google Drive directly.

12. ctrql.rss – a search engine for RSS feeds.

13. deadurl.com – you’ll need this when your bookmarked web pages are deleted.

14. dictation.io – online voice recognition in the browser itself.

15. disposablewebpage.com – create a temporary web page that self-destruct.

16. downforeveryoneorjustme.com – find if your favorite website is offline or not?

17. draw.io – create diagrams and flowcharts in the browser, export your drawings to Google Drive and Dropbox.

18. e.ggtimer.com – a simple online timer for your daily needs.

19. everytimezone.com – a less confusing view of the world time zones.

20. ewhois.com – find the other websites of a person with reverse Analytics lookup.

21. faxzero.com – send an online fax for free – see more fax services.

22. feedmyinbox.com – get RSS feeds as an email newsletter.

23. fiverr.com – hire people to do little things for $5.

24. flightstats.com – Track flight status at airports worldwide.

25. followupthen.com – the easiest way to setup email reminders.

26. formspring.me – you can ask or answer personal questions here.

27. ge.tt – qiuckly send a file to someone, they can even preview it before downloading.

28. goo.gl – shorten long URLs and convert URLs into QR codes.

29. google.com/history – see your past searches, also among most important Google URLs

30. google.com/webfonts – a good collection of open source fonts.

31. gtmetrix.com – the perfect tool for measuring your site performance online.

32. homestyler.com – design from scratch or re-model your home in 3d.

33. hundredzeros.com – the site lets you download free Kindle books.

34. iconfinder.com – find icons of all sizes.

35. ifttt.com – create a connection between all your online accounts.

36. imo.im – chat with your buddies on Skype, Facebook, Google Talk, etc. from one place.

37. iwantmyname.com – helps you search domains across all TLDs.

38. join.me – share you screen with anyone over the web.

39. jotti.org – scan any suspicious file or email attachment for viruses.

40. kleki.com – create paintings and sketches with a wide variety of brushes.

41. kuler.adobe.com – get color ideas, also extract colors from photographs.

42. labnol.org – software tutorials and how-to guides.

43. liveshare.com – share your photos in an album instantly.

44. livestream.com – broadcast events live over the web, including your desktop screen.

45. lmgtfy.com – when your friends are too lazy to use Google on their own.

46. lovelycharts.com – create flowcharts, network diagrams, sitemaps, etc.

47. mailvu.com – send video emails to anyone using your web cam.

48. marker.to – easily highlight the important parts of a web page for sharing.

49. midomi.com – when you need to find the name of a song.

50. minutes.io – quickly capture effective notes during meetings.

51. mixlr.com – broadcast live audio over the web.

52. mondrian.io – create vector drawings in the browser

53. myfonts.com/WhatTheFont – quickly determine the font name from an image.

54. noteflight.com – print music sheets, write your own music online (review).

55. notes.io – the easiest way to write short text notes in the browser.

56. office.com – download templates, clipart and images for your Office documents.

57. onlineocr.net – recognize text from scanned PDFs – see other OCR tools.

58. otixo.com – easily manage your online files on Dropbox, Google Docs, etc.

59. pancake.io – create a free and simple website using your Dropbox account.

60. pdfescape.com – lets you can quickly edit PDFs in the browser itself.

61. picmonkey.com – Picnik is offline but PicMonkey is an even better image editor.

62. pipebytes.com – transfer files of any size without uploading to a third-party server.

63. polishmywriting.com – check your writing for spelling or grammatical errors.

64. printwhatyoulike.com – print web pages without the clutter.

65. privnote.com – create text notes that will self-destruct after being read.

66. qClock – find the local time of a city using Google Maps.

67. radbox.me – bookmark online videos and watch them later (review).

68. random.org – pick random numbers, flip coins, and more.

69. regex.info – find data hidden in your photographs – see more EXIF tools.

70. safeweb.norton.com – check the trust level of any website.

71. scr.im – share you email address online without worrying about spam.

72. screenr.com – record movies of your desktop and send them straight to YouTube.

73. scribblemaps.com – create custom Google Maps easily.

74. seatguru.com – consult this site before choosing a seat for your next flight.

75. similarsites.com – discover new sites that are similar to what you like already.

76. snopes.com – find if that email offer you received is real or just another scam.

77. spypig.com – now get read receipts for your email.

78. stupeflix.com – make a movie out of your images, audio and video clips.

79. sumopaint.com – an excellent layer-based online image editor.

80. tagmydoc.com – add QR codes to your documents and presentations (review).

81. talltweets.com – Send tweets longer than 140 characters.

82. teuxdeux.com – a beautiful to-do app that looks like your paper dairy.

83. timerime.com – create timelines with audio, video and images.

84. tinychat.com – setup a private chat room in micro-seconds.

85. translate.google.com – translate web pages, PDFs and Office documents.

86. tubemogul.com – simultaneously upload videos to YouTube and other video sites.

87. typewith.me – work on the same document with multiple people.

88. typingweb.com – master touch-typing with these practice sessions.

89. unfurlr.come – find the original URL that’s hiding behind a short URL.

90. unsplash.com – download images absolutely free.

91. urbandictionary.com – find definitions of slangs and informal words.

92. wetransfer.com – for sharing really big files online.

93. whichdateworks.com – planning an event? find a date that works for all.

94. whoishostingthis.com – find the web host of any website.

95. wolframalpha.com – gets answers directly without searching   – see more wolfram tips.

96. woorank.com – research a website from the SEO perspective.

97. wordle.net – quick summarize long pieces of text with tag clouds.

98. youtube.com/disco – quickly create a video playlist of your favorite artist.

99. youtube.com/leanback – Watch YouTube channels in TV mode.

100.                    zerodollarmovies.com – find full-length movies on YouTube.

101.                    zoom.it – view very high-resolution images in your browser without scrolling.

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