Okay, let's get started. Question. Number one. What is a common way hackers attempt to shut down in organizations, network? One of the key functions network engineers perform is to ensure that the company's network is kept secure and always available to authorize users. This requires network engineers be familiar with various threats. Hackers used to either penetrate the network or shut it down. One of the more common ways, bad actors attempt to shut down the company's network infrastructure is through the dial of service attacks, also known as DDOS. These types of attacks occur when hackers flood the network with a high number of requests. These request overload the servers and prevent them for processing legitimate network traffic from authorized users. The key to remedy denial, service attacks is to quickly identify them and route the traffic they are creating outside of the network. I also employ preventative measures such as firewalls and robust user authentication to prevent us attacks from occurring.

好了，我们开始吧。问题一。黑客试图关闭组织、网络的常见方式是什么？网络工程师执行的关键功能之一是确保公司的网络保持安全，并始终可供授权用户使用。这就要求网络工程师熟悉各种威胁。黑客过去要么渗透网络，要么关闭网络。其中一个比较常见的方式，不良行为者试图关闭公司的网络基础设施是通过拨号服务攻击，也被称为 DDOS。当黑客向网络发送大量请求时，就会发生这些类型的攻击。这些请求使服务器过载，并阻止它们处理来自授权用户的合法网络流量。补救拒绝服务攻击的关键是快速识别它们，并将它们创建的流量路由到网络外部。我还采取了预防措施，如防火墙和强大的用户身份验证，以防止发生用户攻击。

Question number two, what are the IP classes that make up an IP address? Skill every qualified network engineer should possess is the breakdown complex concepts into simple terms. An interviewer may ask you a question similar to this one to test your ability to do this. They may not be interested in a specific answer to this question, but rather how you go about formulating it as with most questions, keep your answers direct be prepared for a follow up question, which the interviewer we use to explore the topic in more detail and IP address has four sets for octaves of numbers, each with a value up to 255. These are known as IP classes. There are 3 types of IP classes. Each is based on the first octet of IP addresses and is classified as ab or c for example, if the first octet begins with 0 bit than it is a type class a class a has range up to 127. If it starts with its ten, it belongs to class b and ranges from 128 to 191.

第二个问题，组成IP地址的IP类别是什么？每个合格的网络工程师都应具备的技能是将复杂的概念分解为简单的术语。面试官可能会问你一个类似的问题来测试你的能力。他们可能对这个问题的具体答案不感兴趣，而是对你如何制定它感兴趣。与大多数问题一样，保持你的答案直接，为后续问题做好准备，我们的面试官用它来更详细地探讨这个话题，IP地址有四组八度数字，每个值高达255。这些类别称为IP类别。有3种类型的IP类别。每个都基于IP地址的第一个二进制八位数，并被分类为AB或C。例如，如果第一个二进制八位数以位开始，则它是类型A。A类的范围高达127。如果从十开始，它属于B类，范围从128到191。

Finally, the IP class belongs to class c if octet starts with this one ten and has a range from 192 to 223, question number three, what are the different ways data is moved across networks? Knowing how data moves, across the network is critical to any network engineer. This will demonstrate your qualifications for this role, your expertise and setting up and managing networks, and your understanding of which transmission types are best suited for the networks you manage.

最后，如果二进制八位数以10开头，并且范围从192到223，则IP类别属于C类。第三个问题是，数据跨网络移动的不同方式是什么？了解数据如何在网络中移动对任何网络工程师来说都至关重要。这将证明您担任该职位的资格、您在设置和管理网络方面的专业知识，以及您对哪种传输类型最适合您所管理的网络的了解。

There are three ways data is transferred through networks. There are simplex have duplex and full duplex. Data transferred in one direction is called simplex examples of this are setting Information to a printer or another output device. Have duplex transmissions can send data in both directions between two devices, but not at the same time. Finally, all duplex communication occurs in both directions simultaneously. The trade offs between these include complexity, performance, and costs progressing from simplex to pull duplex.

通过网络传输数据有三种方式。有单工、双工和全双工。单向传输的数据称为单工，例如将信息设置到打印机或其他输出设备。双工传输可以在两个设备之间双向发送数据，但不能同时发送。最后，所有双工通信同时在两个方向上发生。两者之间的权衡包括从单工到拉式双工的复杂性、性能和成本。

Question number four, can you describe some of the ways you would secure the computer network? Any viewers will ask you about different ways you perform your job for two reasons. One is confirm that you have the skill set and experience to do this work. The second reason is to see if your methodologies are similar to the ones currently used by their network engineering team. The best way to respond to these is a breakdown the process into individual steps and explain them and simple terminology. There are several ways I can secure. Computer network. It begins with user education and ensuring the users know the importance of keeping their password secure and updating them frequently. Next, I'm so strong authentication software which ensures that only authorize users have access to the network. I also use methodologies, including antivirus programs, fire walls, and VPN technology. Together, all these steps ensure that the network is safe and that the user Information and company data will not be compromised.

第四个问题，你能描述一些保护计算机网络的方法吗？任何观众都会问你不同的工作方式，原因有两个。一是确认你有做这项工作的技能和经验。第二个原因是看看你的方法是否与他们的网络工程团队目前使用的方法相似。应对这些问题的最好方法是将流程分解为单独的步骤，并解释这些步骤和简单的术语。有几种方法我可以确保。计算机网络。它从用户教育开始，确保用户了解保持密码安全和经常更新密码的重要性。接下来，我是如此强大的身份验证软件，它确保只有授权用户才能访问网络。我还使用了一些方法，包括防病毒程序、防火墙和VPN技术。所有这些步骤共同确保网络安全，确保用户信息和公司数据不会被泄露。

Question number five, can you describe the differences between the hub switch and routers? Describing the various components within a network is a fundamental skill that any network engineer should have. The best way to respond to this type of question is provide a general description of the devices, and then discuss each devices, unique feature functions. You should also compare and contrast them, noting their benefits. A hug, switch and router are network devices used to move data around. They're all a type of switch, but with different features and functions, the hub is at least expensive, intelligent, and complicated to three. It broadcast all data to every node, but may cause serious security and reliability issues. Switches work similar to hubs, but more efficiently. It creates dynamic connections, only communicating to a designated node, the router is, the smartest and most complicated out of these three devices, is like a little computer dedicated for transferring network traffic to specific nodes or devices.

第五个问题，你能描述一下集线器交换机和路由器之间的区别吗？描述网络中的各种组件是任何网络工程师都应具备的基本技能。回答这类问题的最佳方式是提供设备的一般描述，然后讨论每个设备的独特功能。你也应该比较和对比它们，注意它们的好处。分组交换设备、交换机和路由器都是用于传输数据的网络设备。它们都是一种类型的交换机，但具有不同的特性和功能，集线器至少是昂贵的、智能的和复杂的。它将所有数据广播到每个节点，但可能导致严重的安全性和可靠性问题。交换机的工作方式与集线器类似，但效率更高。它创建动态连接，只与指定节点通信，路由器是这三种设备中最智能和最复杂的，就像一台专门用于将网络流量传输到特定节点或设备的小型计算机。