Monday, 25 June 2018

255.255.255.0

Do the numbers 255.255.255.0 mean anything to you? Or is it just a set of complex numbers that helps define a computer network?


Let us find out more about 255.255.255.0 and its meaning in a computer network.

Subnetting and 255.255.255.0

Ad





The most common subnet mask used for connecting Internet Protocol (IPv4) network on computers. It is used mostly for home network routers.

A subnet mask helps different devices connected to a network like the router, modem, computers, etc. (local network) communicate with remote addresses.


The traditional subnets are partitioned into one of the five classes (Class A/B/C/D/E). This depends on the value of the IP address of the number. The subnet mask converts into a 32-bit binary value.



This value is as follows:

11111111 11111111 11111111 00000000


The ‘0’ in the above value mask span the IP range of the subnet.

For example, a computer’s IP address is 192.168.1.256, the subnet mask is 255.255.255.0. So, the computer and every other device in the same network will have the same IP address with the last three numbers that will vary. Similarly, the computer having a subnet mask is 255.255.0.0, and then all computer in the local network will be 192.168.xxx.xxx.

Use of Subnetting




Subnetting is very useful for home networks. However, it is mostly used for larger networks having more than 255 computers in the network.  

References:

1.https://www.lifewire.com/255-255-255-0-ip-networking-818371

Things You Need to Know Before Buying a Laptop

Thinking of buying a new laptop? Confused as there are plenty of models to choose from? Laptops today no longer need to be upgraded every couple of years, thus making it difficult to choose from the latest models when you decide to go in for a new one.

We shall discuss a few things you need to know before buying a laptop.

Quick Tips That Help You Buy a Laptop


There are plenty of choices to choose from when it comes to laptop. You can address the challenge by going through the following things you need to know before buying a laptop.

1.Size Matters


The first thing to consider is the size of your laptop. From 12.5 inches to 14 inches you need to select the size best suited as per your need. Smaller model is good for children for their school projects or if you travel a lot and need a laptop more for recreation or occasional work. Large screen sizes are perfect for professionals as well as college students. Your laptop should have a 1920 x 1080 screen. It would be even better if you go in for a 2-in-1 laptop that can be used as a laptop and a tablet. It is great for college and school students who can use the device as per their need. A touch screen laptop can be preferred if you are going in for Windows 10 OS.

2.Decide the Operating System (OS)


It is important to address this important problem as it will be the deciding factor as to your ease of use. Not all are well versed with Mac OS and if you suddenly decide to switch over, and then make sure you adapt quickly. Laptops come with 3 different OS namely, Windows, MacOS and Chrome OS.

Windows is one of the most versatile and widely used OS. It is simple to use and has many features comparable to MacOS and Chrome OS. The latest version Windows 10 has many improvements and comes with a powerful digital assistant called Cortana. Live tiles, use of stulus, touch screen compatibility, etc. are all now part of the latest Windows 10 version.

All MacBooks now come with Apple’s latest desktop OS called the macOS High Sierra. It is similar to Windows 10 in functionality but has a different interface. The virtual assistant in MacBooks is Siri. You can access your iPhone from the laptop and even unlock your laptop using Apple Watch using Siri.

Chromebooks such as Samsung Chromebook 3 are cheaper as compared to the Windows OS and MacOS. They have an interface similar to Windows and is mostly used for Chrome Browser. If you need to just check emails, chat, and spend time on social media, then Chromebooks are a good option. They are easy to carry and most preferred by parents of school children. It is hard for malware to infect and thus, useful for children. Look for Chromebooks with minimum 4GB Ram, 16 GB storage, 1920 x 1080 screen resolution (hard to find).

3.The Ergonomics Factor


Do not overlook the keyboard and touchpad feature before you buy a laptop. If you need to work a lot on your laptop then make it has a good tactile feature with a good vertical travel that is the distance travelled when the key is pressed (about 1 to 2mm). The keys should have enough space between them and should not crowd when you try and type. You should also consider a separate numerical pad on the keyboard. It will be very helpful if you use more of excel sheets. The touchpad should be able to respond immediately to your gestures and be able to pinch-and-zoom with ease.

4.Specification is the Final Game


You need to thoroughly think about the processor, hard drive, graphics chip, and RAM before you invest in a laptop. Yes, specifications may sound confusing to most but make sure you keep these points in mind.

Firstly, the CPU is what makes your laptop function. You can choose an Intel Core i5, which provides you with the best performance at the best price. Choose model numbers which end in U. Model numbers that end with Y have low power and those with HQ should be avoided. They tend to use more wattage and are found mostly in workstation or gaming systems.

Intel Core i3 are a notch below i5 performance wise. If you have budget issues, then i3 won’t disappoint you much. Intel Core i7 are a notch above i5. The models that have HQ or K in the end use higher wattage. They have four cores that allow better gaming and productivity. Those of Core i7 Y series have lower power performance. If you find a laptop with 8 in the model number, then it belongs to the latest8th Generation Core Series (Kaby Lake Refresh) available only in the U series models.

AMD processors are found in low-cost laptops and offer a good deal for your money. It is enough for those who are looking forward to surf the web, entertainment and well as productivity.
Moving over the RAM, you should go in for at least 4 GB RAM even if on a budget. And if you can loosen your purse strings a bit more then opt for 8 GB RAM.

Next thing to consider isthe battery life. Do not go in for laptops that cannot provide at least 7 hours of work whether at home or office. A laptop with 8+ hours of battery life is considered ideal. Make sure you read all the reviews related to the laptop battery life before making a decision.
Keep you budget in mind and choose your brand wisely. Brands do matter and go for companies with a good after-service support. Check out at least 4 to 5 laptops and then make the kill. And before you do that, do go through the things you need to now before buying a laptop discussed above.

Reference:


1.https://www.pcworld.idg.com.au/article/556585/top-10-things-consider-when-buying-new-laptop/
2.https://www.cnet.com/pictures/13-things-you-need-to-know-to-buy-the-perfect-laptop/
3.https://www.laptopmag.com/articles/laptop-buying-guide
4.https://www.quora.com/What-should-I-know-before-I-buy-a-laptop
5.https://www.indiatoday.in/technology/buying-guide/story/6-things-to-consider-before-you-buy-a-laptop-321067-2016-05-02
6.https://www.gadgetsnow.com/slideshows/planning-to-buy-a-laptop-8-things-to-consider/ports-usb-type-c-ethernet-and-what-else/photolist/57192068.cms

Types of Cloud Storage Explained

Information can easily be passed on around the world easily in today’s digital world. This has led to accumulation of lot of information in form of files, folders, photographs, videos, software, applications, etc. Information can either be for personal or professional use. Businesses need to store the personal information of their clients and customers. Storing data becomes a problem as well as people now need to access information on the go. Thus, cloud storage comes into picture wherein you can store applications, software, as well as databases online. One can access the cloud storage from any place or anytime from the web.

There are different types of cloud storage. Let us have a look at the different cloud storage types in the following article.

Classification of Types of Cloud Storage


Cloud storage is preferred by many businesses as it helps saving cost and makes it easy to manage data and share it with authorized people.

There are three types of cloud storage:

1.Private Cloud Storage


Private clouds are specifically designed for an individual or business as per their specific needs. These private clouds can be available in two formats, on-premise and externally hosted. Externally hosted private clouds are useful for individuals and small businesses. On-premise private cloud servers are usually opted by large organizations and businesses.

The data center architecture is owned by an individual company. Thus, it provides flexibility, automation, monitoring, provisioning, and scalability. The private cloud storage services are expensive as the businesses no longer need to maintain their own data center. The data center is covered with strong security and compliance specifications, thus, storing all data under the company’s firewall.

2.Public Cloud Storage


The public cloud storage requires less administrative controls and can be accessed by anyone who is authorized to view the database. The security system is different from that on a private cloud. Thus, it is not wise to put up sensitive data on the public cloud and rigidly integrate it with your business.
Pubic cloud storage is actually the Internet. Cloud service providers (CSP)tend to use resources and applications such as Software-as-a-service (SaaS) for the general public on the cloud. This includes Amazon Elastic Compute Cloud, Sun Cloud, Google AppEngine, Windows Azure Services Platform, etc.

The public cloud storage service is usually pay-per-usage model and the company just needs to pay according to the storage capacity used. Public cloud storage is not the right choice for all businesses. It has limited security, configuration and SLA specificity.

3.Hybrid Cloud Storage


As the name suggests, it is a combination of private and public storage. The features can be customized as per your need and integrate it with the applications. Sensitive data can be stored on the private cloud and data that needs to be accessed with different users can be placed on the public cloud.

During peak periods, the company can transfer certain applications or part of applications to be migrated on the Public Cloud. Also, during emergencies such as natural disasters, scheduled maintenance, blackouts, Internet outage etc. data can be migrated to a public cloud for a certain period of time.

These are the 3 basic types of cloud storages available for migrating your databases and applications on the cloud. Make sure you think twice before selecting any particular type of cloud storage for your business.

References:

1.https://www.opencloudmanifesto.org/what-is-cloud-storage-types-advantages-and-disadvantages/
2.http://www.cloudstoragebest.com/cloud-storage-types/
3.https://www.asigra.com/blog/cloud-types-private-public-and-hybrid#
4.https://cloudstorageadvice.com/what-is-cloud-storage/