Which Statement Regarding The Selection Of A Hard Drive Is Accurate?

The magnetic drives will have a larger capacity when compared with solid-state drives. Today, let us discuss magnetic drives and the difference between magnetic and solid-state drives. The magnetic drive which usually called the hard disk or a hard drive. The floppy disks are also called magnetic disks. Let us know how a magnetic drive looks like, it has a spindle to which we can attach the platters. All the platters are attached to the spindle and rotate at the same speed. The below figure represents the structure of how the magnetic drive looks like.

The single platter has a surface that is covered with magnetic material on one side and the other.

We normally have the three platters that actually have the six surfaces. The data bits can be present on all the surfaces. We can access this data by having a simple magnetic head that is attached to an arm and another one at the lower surface.

All of these heads are attached to a head assembly that can move all the heads in unison. All the heads will be in the same position as the different platters. We move all of these heads at the same time. Each head can able to access its own surface and all of this will be going with the same distance in the spindle. This is called the track. All of the tracks will be at the same distance from the spindle that forms a shape called the cylinder. The cylinder will simple consists of one track from each surface and the tracks in the cylinders are the one can be accessed by the different heads at the same time.

The data along the one track is divided into the form of different sectors, and each sector will be the smallest unit that we can actually read.

Now, let us know what actually the solid-state drives are, it is like a data storage drive that can store the information in the computer. The solid-state drive can use flash memory in order to store the data when the system gets turned off. The solid-state drive has the same process as the traditional hard drives in accessing the data. This solid-state drive has common interfaces which are compatible with hardware drives. This solid-state drive uses some of the interfaces like m.2 and the SATA. Solid-state drives are quite different from traditional and mechanical drives. We can access the data much quicker in the solid-state drives and has a lower latency in it.

These solid-state drives are mostly used in the IBM think pads, and in the SanDisk corporation. The speed and the performance of the solid-state drive are much more than the hard disk drive. The SSD’s have speeds in the range of microseconds and the usually read and write speed is in the range of 400 to 500 Mbps. We can also use it as the sequential read and write with the speed of gigabytes per second.

Which Statement Regarding The Usb Standard And Usb Devices Is Accurate?

The USB standard and the USB devices will be having four types of wires for communication and for power. Today let us learn about USB ports, USB cables, and USB communication. The USB stands for the universal serial bus, it is a standard that is used to connect all the peripherals to the computer. The USB port is the most commonly used port. The name itself represents that the USB port is commonly used in most cases. It can be used in many different ways like scanners, flash drives, cameras, keyboards, and many more. These USB ports can even perform networking and many more. It is also used to charge devices like phones. All the desktops and laptops will be having several USB ports in them.

The main aim of the development of the USB is to connect the devices to the computer. This can be done by first making the standard connector and eliminating all the other connectors. And also by making the connected devices that are easy to configure, and at last by providing the faster transfer rates.

The USB port is hot-swappable which means the devices can be connected or get disconnected without the turning of the computer or the devices. The USB can also self configure itself that can eliminate the requirement of the external configurations.

And by connecting to the computer, the smaller devices can be powered by USB ports without the need for any additional power cables.

The first version of the USB has a transfer speed of 1.5 megabits per second. And the next version has a transfer speed of 12 megabits per second. The USB 2.0 has a high speed with a speed of 480 megabits per second. And in 2008 the USB 3.0 is released that has a super speed of 5 gigabits per second.

The high speed is mainly for transferring large amounts of data, such as the backing up of the external hard drive. The USB 3.1 has a transfer speed of 10 gigabits per second. And the USB 3.2 has a transfer speed of 20 gigabits per second. The USB 4 has a transfer rate of 40 gigabits per second.

We also have different types of cables connectors, ports. The Cables normally have two different connectors on each end cable. They will be having the Type A or Type B or Type C connectors at different ends. The Type A connectors will be the host connector, this is the standard rectangular plug that we would plug into the computers. These computers will be having several type-A USB ports in them.

We can find different types of connectors at the other end of the USN cable like Type B connectors. Type B has a square design, this is the type of connector, that we plug into most of the printers. It can also be used in other devices like external hard drives, microphones, etc. We can also use the mini B connector which is mostly used for smaller devices like smartphones, digital cameras, etc.

What Routing Metric Affects A Path’s Potential Performance Due To Delay?

The latency will affect a path’s potential performance due to delay. Now, let us discuss the routing metrics in detail. We all know that we have several different types of routing protocols. Each of these routing protocols has unique features and characteristics. These routing protocols can be used for many reasons at some point in the network.

All of these routing protocols will use a metric. Here we will talk about the main purpose of the metric and how it is used. And we also learn about the routing protocol metrics among all other routing protocols.

When multiple updates are received to the same route, in order to determine the best route, we use the routing metrics protocol. The routing can see several updates from all the different routers from the same network. The metric is like a numeric value and the difference between each of the routing protocols can be a small value or can be a large value. The routing protocol can look at the metric of all the similar routes and will use the lowest metric in order to determine the best route. Therefore, we can say that the lower the metric is, the best the route can be.

The routing protocol will look into it, if it didn’t have a metric, it would be having all the updates in the same network. But we wouldn’t know which one will be in the use.

When a router receives several paths to find the destination address, and the one which can make into the routing table is known to be the best path. We can use different methods in order to find the best path.

We assign a value to each path, this is called the metric value. In all of the metric values, we only prefer the lowest metric value. Each router can take the information and will make its own best path to reach the destination.

We have distance-vector routers and link-state routers, they will advertise the network and its metric to the other networks. For suppose, when we cannot find the best route path, then we discard it from the routing table and use the next best path. This is the main advantage of dynamic routing. The routing table can update itself if any changes happened in the network.

There are different metrics that are used by the different routing protocols. The first one is Rip. The rip stands for routing information protocol, this will always use the Hop count as the metric value. Certain types of routing protocols can able to analyze the topology in many ways.

The network service providers can maintain several connections to main the network redundancy. In order to make a better decision and in order to get the exact location, to find the best among the multiple routes., we can use algorithms, rip count can be used to calculate the routing metrics. All these different routing protocols can take different things into consideration.

Which Statement Is True About Cdp On A Cisco Device?

The main concept in CDP is that it can be able to disable on any specific interface or it can be disabled globally. Today, let us learn about what actually the CDP is and the working of the CDP on a Cisco device. The term CDP stands for cisco discovery protocol. The CDP is a protocol that is commonly discussed in Cisco devices. It is like a cisco proprietary protocol that normally works at layer 2 of the OSI model.

Layer 2 of the OSI model is nothing but the data link layer. The main work of this cisco discovery protocol is to learn about all the devices which are directly connected to their physical interface. Or it can be connected across the VLANs. By using this cisco discovery protocol, we can able to know the information about the IP addresses, what is the port is being in use, what is equipment is being in use, and many more. All this information is useful to the people or the users who are new to the network, we can also see where the device uplinks were, where all the switch-up links to the routers.

The cisco discovery process will be the best practice in order to set the whole timer. It is almost three times greater than the cisco discovery packet. The cisco discovery packet is like a frame that we send. It can only take up to 60 seconds to gain all the information in it. When the router can receive the cisco discovery protocol packet, it can able to respond with all the information or details. Now, let us take an example to understand this concept in detail. Let us consider router 1, router 2, and router 3. When all these routers are get connected to each other, the cisco discovery protocol helps to know, which router is connected at what location. If the CDP is not get enabled, we cannot able to see the location of the routers where they are connected or to whom they are connected with.

In order to enable the cisco discovery protocol, we need to use the command called “config t”, this will allows the CDP to be enabled. The cisco discovery protocol can also be dangerous, any user can able to access the network, they can simply connect like a virtual router, which is quite harmful sometimes. If any malicious user is accessed, they will know all the information like Ip details, port information, and also about version numbers. So it can be a bit risky when coming to security if we want to run the cisco discovery router at an open network. So we need to enable the CDP only one some of the specific ports which are risk-free. We need to enable the cisco discovery protocols only on the devices which we have known or on the device where anyone cannot be simply plugged into it. This is a much better thing to do if we want to avoid any malicious users.

What Is Contained In The Trailer Of A Data-Link Frame?

The Trailer of a data link frame has all the information about error detection. Today, let us look a closure look into the data link layer. The Data link layer is the second layer of the OSI model. The data link layer is mainly responsible for the transferring of the data between the two hosts.

These hosts are directly linked via a network. The data link layer will offer a service called framing. Now, let us learn the concepts of framing in detail. Let us take an example to understand this concept in detail. Let say, we have two devices that are connected through each other. Each has a device, that has an adapter connected to it. This adapter is used to transmit the information between the two devices. Whatever information that we receive from the data link layer, will be converted in the form of signals.

This kind of cable can be transmitted through a medium, which is then received at the physical layer of the OSI model. Now, the main problem here is that the application which has the information will transmit the data in the form of the zeros and the ones. It converts into the transport layer.

In the transport layer, the will add some of the zeroes, ones, and then it transfers to the network layer of the OSI model. After the network layer, it will be gone to the data link layer, in the data link layer, we will add some sets of the zeroes and ones at the header and the trailer part. This addition of zeroes and ones at header and trailer, we call it as the frame.

These frames can only be understood by the data link layer. All the frames will transmit from the host to the host. The framing consists of a header, data, and the trailer part as shown in the below figure 1.1. Here the header part consists of the frame start, its types, quality control and add. And the trailer consists of error detection and the frame stop. And in the middle, we have the exact data which we need to send.

Simply, between the two devices, when they want to communicate with each other knowingly, we use the frame. These frames set a header and trailer at the end of each data in order to get clarity to the receiver where the data gets ended. The header and trailer contain the same information so that the receiver knows the set of information present in a frame.

At the trailer part, we can also find the detection of the errors along with the trailer part. The detection of errors has two techniques, we add some group of bits at the end of the data. So that we can able to detect the errors, another method is the exact count encoding. The below figure shows the format of the data link frame and the sub parts of the data link frame.

1.1