- 1 Kinh Nghiệm Hướng dẫn With which of the following can users transfer items to and from other computer on the Internet Mới Nhất
- 2 Networking
- 3 What is a computer network?
- 4 Computer network types
- 5 Important terms and concepts
- 6 Examples of computer networks
- 7 Computer networks and the internet
- 8 How do they work?
- 9 Architecture
- 10 Security
- 11 Mesh networks
- 12 Load balancers and networks
- 13 Content delivery networks
- 14 Computer networking solutions and IBM
- 14.1 Which of the following can you have a real time typed conversation with another connected user?
- 14.2 What manages the resources on a network?
- 14.3 Is an environment where processors are embedded in objects that communicate with one another via the Internet or wireless networks?
- 14.4 Which of the following consists of a worldwide collection of electronic documents?
- 14.5 Video With which of the following can users transfer items to and from other computer on the Internet ?
- 14.6 Chia Sẻ Link Download With which of the following can users transfer items to and from other computer on the Internet miễn phí
Kinh Nghiệm Hướng dẫn With which of the following can users transfer items to and from other computer on the Internet Mới Nhất
Quý khách đang tìm kiếm từ khóa With which of the following can users transfer items to and from other computer on the Internet được Cập Nhật vào lúc : 2022-08-20 22:50:20 . Với phương châm chia sẻ Bí kíp Hướng dẫn trong nội dung bài viết một cách Chi Tiết 2022. Nếu sau khi Read Post vẫn ko hiểu thì hoàn toàn có thể lại Comment ở cuối bài để Admin lý giải và hướng dẫn lại nha.
In this introduction to networking, learn how computer networks work, the architecture used to design networks, and how to keep them secure.
Nội dung chính
- NetworkingWhat is a computer network?Computer network typesImportant terms and conceptsExamples of computer networksComputer networks and the internetHow do they work?ArchitectureMain types of network architectureNetwork topologyMesh networksType of mesh networksLoad balancers and networksContent
delivery networksComputer networking solutions and IBMWhich of the following can you have a real time typed conversation with another connected user?What manages the resources on a network?Is an environment where processors are embedded in objects that communicate with one another via the Internet or wireless networks?Which of the following consists of a worldwide collection of electronic documents?
What is a computer network?
A computer network comprises two or more computers that are connected—either by cables (wired) or WiFi (wireless)—with the purpose of transmitting, exchanging, or sharing data and resources. You build a computer network using
hardware (e.g., routers, switches, access points, and cables) and software (e.g., operating systems or business applications).
Geographic location often defines a computer network. For example, a LAN (local area network) connects computers in a defined physical space, like an office building, whereas a WAN (wide area network) can connect computers across continents. The internet is the largest example of a WAN, connecting billions of computers worldwide.
You can further
define a computer network by the protocols it uses to communicate, the physical arrangement of its components, how it controls traffic, and its purpose.
Computer networks enable communication for every business, entertainment, and research purpose. The internet, trực tuyến search, email, audio and video sharing, trực tuyến commerce, live-streaming, and social networks all exist because of computer networks.
Computer network types
As networking needs evolved, so did the computer
network types that serve those needs. Here are the most common and widely used computer network types:
LAN (local area network): A LAN connects computers over a relatively short distance, allowing them to share data, files, and resources. For example, a LAN may connect all the computers in an office building, school, or hospital. Typically, LANs are privately owned and managed.
WLAN (wireless local area network): A WLAN is
just like a LAN but connections between devices on the network are made wirelessly.
WAN (wide area network): As the name implies, a WAN connects computers over a wide area, such as from region to region or even continent to continent. The internet is the largest WAN, connecting billions of computers worldwide. You will typically see collective or distributed ownership models for WAN management.
MAN (metropolitan area
network): MANs are typically larger than LANs but smaller than WANs. Cities and government entities typically own and manage MANs.
PAN (personal area network): A PAN serves one person. For example, if you have an iPhone and a Mac, it’s very likely you’ve set up a PAN that shares and syncs content—text messages, emails, photos, and more—across both devices.
SAN (storage area network): A SAN is a
specialized network that provides access to block-level storage—shared network or cloud storage that, to the user, looks and works like a storage drive that’s physically attached to a computer. (For more information on how a SAN works with block storage, see Block Storage: A Complete Guide.)
CAN (campus area network): A CAN is also known as a corporate area network. A CAN is larger than a LAN but smaller than a WAN. CANs serve sites such as colleges, universities, and business campuses.
VPN (virtual private network): A VPN is a secure, point-to-point connection between two network end points (see ‘Nodes’ below). A VPN establishes an encrypted channel that keeps a user’s identity and access credentials, as well as any data
transferred, inaccessible to hackers.
Important terms and concepts
The following are some common terms to know when discussing computer networking:
IP address: An IP address is a unique number assigned to every device connected to a network that uses the Internet Protocol for communication. Each IP address identifies the device’s host network and the location of the device on the host network. When one device sends data to another, the
data includes a ‘header’ that includes the IP address of the sending device and the IP address of the destination device.
Nodes: A node is a connection point inside a network that can receive, send, create, or store data. Each node requires you to provide some form of identification to receive access, like an IP address. A few examples of nodes include computers, printers, modems, bridges, and switches. A node is essentially any network device that can
recognize, process, and transmit information to any other network node.
Routers: A router is a physical or virtual device that sends information contained in data packets between networks. Routers analyze data within the packets to determine the best way for the information to reach its ultimate destination. Routers forward data packets until they reach their destination node.
Switches: A switch is a device that connects other
devices and manages node-to-node communication within a network, ensuring data packets reach their ultimate destination. While a router sends information between networks, a switch sends information between nodes in a single network. When discussing computer networks, ‘switching’ refers to how data is transferred between devices in a network. The three main types of switching are as follows:
Circuit switching, which establishes a dedicated communication path between nodes
in a network. This dedicated path assures the full bandwidth is available during the transmission, meaning no other traffic can travel along that path.
Packet switching involves breaking down data into independent components called packets which, because of their small size, make fewer demands on the network. The packets travel through the network to their end destination.
Message switching sends a message in its entirety from the source node,
traveling from switch to switch until it reaches its destination node.
Ports: A port identifies a specific connection between network devices. Each port is identified by a number. If you think of an IP address as comparable to the address of a khách sạn, then ports are the suites or room numbers within that khách sạn. Computers use port numbers to determine which application, service, or process should receive specific messages.
cable types: The most common network cable types are Ethernet twisted pair, coaxial, and fiber optic. The choice of cable type depends on the size of the network, the arrangement of network elements, and the physical distance between devices.
Examples of computer networks
The wired or wireless connection of two or more computers for the purpose of sharing data and resources form a computer network. Today, nearly every digital device belongs to a computer
In an office setting, you and your colleagues may share access to a printer or to a group messaging system. The computing network that allows this is likely a LAN or local area network that permits your department to share resources.
A city government might manage a city-wide network of surveillance cameras that monitor traffic flow and incidents. This network would be part of a MAN or metropolitan area network that allows city emergency personnel to respond to traffic
accidents, advise drivers of alternate travel routes, and even send traffic tickets to drivers who run red lights.
The Weather Company worked to create a peer-to-peer mesh network that allows mobile devices to communicate directly with other mobile devices without requiring WiFi or cellular connectivity. The Mesh Network Alerts project allows the delivery of life-saving weather information to
billions of people, even without an internet connection.
Computer networks and the internet
The internet is actually a network of networks that connects billions of digital devices worldwide. Standard protocols allow communication between these devices. Those protocols include hypertext transfer protocol (the ‘’ in front of all website addresses). Internet protocol (or IP addresses) are the unique identifying numbers required of every device that accesses the internet. IP
addresses are comparable to your mailing address, providing unique location information so that information can be delivered correctly.
Internet Service Providers (ISPs) and Network Service Providers (NSPs) provide the infrastructure that allows the transmission of packets of data or information over the internet. Every bit of information sent over the internet doesn’t go to every device connected to the internet. It’s the combination of protocols and infrastructure that tells information
exactly where to go.
How do they work?
Computer networks connect nodes like computers, routers, and switches using cables, fiber optics, or wireless signals. These connections allow devices in a network to communicate and share information and resources.
Networks follow protocols, which define how communications are sent and received. These protocols allow devices to communicate. Each device on a network uses an Internet Protocol or IP address, a string of numbers that
uniquely identifies a device and allows other devices to recognize it.
Routers are virtual or physical devices that facilitate communications between different networks. Routers analyze information to determine the best way for data to reach its ultimate destination. Switches connect devices and manage node-to-node communication inside a network, ensuring that bundles of information traveling across the network reach their ultimate destination.
network architecture defines the physical and logical framework of a computer network. It outlines how computers are organized in the network and what tasks are assigned to those computers. Network architecture components include hardware, software, transmission truyền thông (wired or wireless), network topology, and communications protocols.
Main types of network architecture
There are two types of network architecture: peer-to-peer (P2P) and client/server. In P2P
architecture, two or more computers are connected as “peers,” meaning they have equal power and privileges on the network. A P2P network does not require a central server for coordination. Instead, each computer on the network acts as both a client (a computer that needs to access a service) and a server (a computer that serves the needs of the client accessing a service). Each peer makes some of its resources available to the network, sharing storage, memory, bandwidth, and processing power.
In a client/server network, a central server or group of servers manage resources and deliver services to client devices in the network. The clients in the network communicate with other clients through the server. Unlike the P2P model, clients in a client/server architecture don’t share their resources. This architecture type is sometimes called a tiered model because it’s designed with multiple levels or tiers.
Network topology refers to how the nodes and
links in a network are arranged. A network node is a device that can send, receive, store, or forward data. A network link connects nodes and may be either cabled or wireless links.
Understanding topology types provides the basis for building a successful network. There are a number of topologies but the most common are bus, ring, star, and mesh:
A bus network topology is when every network node is directly connected to a main cable.
In a ring
topology, nodes are connected in a loop, so each device has exactly two neighbors. Adjacent pairs are connected directly; non-adjacent pairs are connected indirectly through multiple nodes.
In a star network topology, all nodes are connected to a single, central hub and each node is indirectly connected through that hub.
A mesh topology is defined by overlapping connections between nodes. You can create a full mesh topology, where every node
in the network is connected to every other node. You can also create partial mesh topology in which only some nodes are connected to each other and some are connected to the nodes with which they exchange the most data. Full mesh topology can be expensive and time-consuming to execute, which is why it’s often reserved for networks that require high redundancy. Partial mesh provides less redundancy but is more cost effective and simpler to execute.
network security protects the integrity of information contained by a network and controls who access that information. Network security policies balance the need to provide service to users with the need to control access to information.
There are many entry points to a network. These entry points include the hardware and software that comprise the network itself as well as the devices used to access the network, like computers, smartphones, and tablets. Because of these entry points,
network security requires using several defense methods. Defenses may include firewalls—devices that monitor network traffic and prevent access to parts of the network based on security rules.
Processes for authenticating users with user IDs and passwords provide another layer of security. Security includes isolating network data so that proprietary or personal information is harder to access than less critical information. Other network security measures include ensuring hardware and
software updates and patches are performed regularly, educating network users about their role in security processes, and staying aware of external threats executed by hackers and other malicious actors. Network threats constantly evolve, which makes network security a never-ending process.
The use of public cloud also requires updates to security procedures to ensure continued safety and access. A secure cloud demands a secure underlying network.
the top five considerations (PDF, 298 KB) for securing the public cloud.
As noted above, a mesh network is a topology type in which the nodes of a computer network connect to as many other nodes as possible. In this topology, nodes cooperate to efficiently route data to its destination. This topology provides greater fault tolerance because if one node fails, there are many other nodes that
can transmit data. Mesh networks self-configure and self-organize, searching for the fastest, most reliable path on which to send information.
Type of mesh networks
There are two types of mesh networks—full mesh and partial mesh:
- In a full mesh topology, every network node connects to every other network node, providing the highest level of fault tolerance. However, it costs more to execute. In a partial mesh topology, only some nodes connect, typically
those that exchange data most frequently.A wireless mesh network may consist of tens to hundreds of nodes. This type of network connects to users over access points spread across a large area.
Load balancers and networks
Load balancers efficiently distribute tasks, workloads, and network traffic across available servers. Think of load balancers like air traffic control an airport. The load balancer observes all traffic coming into a network and
directs it toward the router or server best equipped to manage it. The objectives of load balancing are to avoid resource overload, optimize available resources, improve response times, and maximize throughput.
For a complete overview of load balancers, see Load Balancing: A Complete Guide.
A content delivery network (CDN) is a distributed server network that delivers temporarily stored, or cached, copies of website content to users based on the user’s geographic location. A CDN stores this content in distributed locations and serves it to users as a way
to reduce the distance between your website visitors and your website server. Having cached content closer to your end users allows you to serve content faster and helps websites better reach a global audience. CDNs protect against traffic surges, reduce latency, decrease bandwidth consumption, accelerate load times, and lessen the impact of hacks and attacks by introducing a layer between the end user and your website infrastructure.
Live-streaming truyền thông, on-demand truyền thông, gaming
companies, application creators, e-commerce sites—as digital consumption increases, more content owners turn to CDNs to better serve content consumers.
Computer networking solutions and IBM
Computer networking solutions help businesses enhance traffic, keep users happy, secure the network, and easily
provision services. The best computer networking solution is typically a unique configuration based on your specific business type and needs.
Content delivery networks (CDNs),
load balancers, and network security—all mentioned above—are examples of technologies that can help businesses craft
optimal computer networking solutions. IBM offers additional networking solutions, including:
- Gateway appliances are devices that give you enhanced control over network traffic, let you accelerate your network’s performance, and give your network a security boost. Manage your physical and virtual
networks for routing multiple VLANs, for firewalls, VPN, traffic shaping and more.Direct Link secures and accelerates data transfer between private infrastructure, multiclouds, and IBM Cloud.Cloud Internet Services are security and performance capabilities designed to protect public-facing web content and applications before they reach the cloud. Get DDoS protection, global load balancing and a suite of security, reliability and performance capabilities designed to protect public-facing web
content and applications before they reach the cloud.
Networking services in IBM Cloud provide you with networking solutions to enhance your traffic, keep your users happy, and easily provision resources as you need them.
Build networking skills and get IBM Professional Certification through the courses within the Cloud Site Reliability
Engineers (SRE) Professional curriculum.
Sign up for an IBMid and create your IBM Cloud account.
Which of the following can you have a real time typed conversation with another connected user?
Uses of Communications Technologies.
What manages the resources on a network?
Explanation: Operating system software is that manages resources on a network.
Is an environment where processors are embedded in objects that communicate with one another via the Internet or wireless networks?
Internet of Things (IoT)
an environment where processors are embedded in every product imaginable (things), and these things communicate with one another via the Internet or wireless networks. stores data on an embedded chip instead of a magnetic stripe.
Which of the following consists of a worldwide collection of electronic documents?
GlossaryWebWorldwide collection of electronic documents called Web pages, the Web is one of the more popular services on the Internet. See also World Wide Web or WWW.Student Resource Glossary – Cengagewww.cengage › cgi-wadsworth › course_products_wpnull
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