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10 Inter-VLAN Communication
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By default, a Layer 2 switching network is a broadcast domain, which brings many
problems. Virtual local area network (VLAN) technology isolates such broadcast
domains, preventing users in different VLANs from communicating with each
other. However, such users sometimes need to communicate.
This course describes how to implement inter-VLAN communication.
30 Pages
4298 Views
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1.45 MB
Uploaded: 2024-11-15
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11. Eth-Trunk, iStack, and CSS
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As services develop and the campus network scale expands, users have
increasingly demanding requirements on network bandwidth and reliability.
Traditional solutions improve network bandwidth by upgrading devices and
implement high reliability by deploying redundant links and using the Spanning
Tree Protocol (STP), leading to low flexibility, time-consuming troubleshooting, and
complex configuration.
This chapter describes how to use Eth-Trunk, intelligent stack (iStack), and cluster
switch system (CSS) technologies to improve network bandwidth and reliability.
48 Pages
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2.23 MB
Uploaded: 2024-11-15
12 ACL Principles and Configuration
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Rapid network development brings challenges to network security and quality of service(QoS). Access control lists (ACLs) are closely related to network security and QoS. By accurately identifying packet flows on a network and working with other technologies, ACLs can control network access behaviors, prevent network attacks, and improve network bandwidth utilization, thereby ensuring network environment security and QoS reliability. This course describes the basic principles and functions of ACLs, types and characteristics of ACLs, basic composition of ACLs, ACL rule ID matching order, usage of wildcards, and ACL configurations.
27 Pages
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Uploaded: 2024-11-15
13. AAA Principles and Configuration
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User management is one of the most basic security management requirements for
any network. Authentication, authorization, and accounting (AAA) is a management framework that provides a security mechanism for authorizing some users to access specified resources and recording the operations of these users. AAA is widely used because of its good scalability and easy implementation of centralized management of user information. AAA can be implemented through multiple protocols. In actual applications, the Remote Authentication Dial-In User Service (RADIUS) protocol is the most commonly used to implement AAA.
This course describes the basic concepts, implementation, basic configurations, and
typical application scenarios of AAA.
21 Pages
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Uploaded: 2024-11-15
14 Network Address Translation
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With the development of the Internet and the increase of network applications,
limited public IPv4 addresses have become the bottleneck of network
development. To solve this problem, Network Address Translation (NAT) was
introduced.
NAT enables hosts on an internal network to access an external network. It not
only helps alleviate IPv4 address shortage but also improves the security of the
internal network as NAT prevents devices on the external network from directly
communicating with hosts on the internal network that uses private addresses.
This course describes the motivation behind NAT, and implementations and
application scenarios of different types of NAT.
32 Pages
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1.17 MB
Uploaded: 2024-11-15
15. Network Services and Applications
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The Internet has become an integral part of our lives, with a wide range of
applications such as file transfer, email sending, online video, web browsing, and
online gaming. Because of the layered network model, common users can use
various services provided by the application layer, without knowing technical
details such as communication technology implementations.
In previous courses, we have learned technologies related to the data link layer,
network layer, and transport layer. This chapter will describe common network
services and applications such as FTP, DHCP, and HTTP.
50 Pages
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1.7 MB
Uploaded: 2024-11-15
UCU110.Communication and collaboration skills
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These notes are summarizes in a manner that make your studies more simple and efficient
115 Pages
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Uploaded: 2024-11-15
16 WLAN Overview
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Wired LANs are expensive and lack mobility. The increasing demand for portability
and mobility requires wireless local area network (WLAN) technologies. WLAN is now the most cost-efficient and convenient network access mode. This course introduces the development of WLAN in different phases, concepts related to WLAN technologies, implementation and basic configurations of common WLAN networking architectures, and WLAN development trends.
73 Pages
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1.99 MB
Uploaded: 2024-11-15
SBC 120 : Introduction to genetics
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This is an affordable access to some questions to expect In your exams
2 Pages
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Uploaded: 2024-11-15
17. WAN Technologies
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As economic globalization and digital transformation accelerate, enterprises keep expanding their scales. More and more branches locate in different regions, with each branch network being considered as a local area network (LAN). The headquarters and branches need to cross geographical locations to communicate with each other. To better carry out services, an enterprise needs to connect these geographically dispersed branches through a wide area network (WAN).
The development of the WAN technologies is accompanied by the continuously increased bandwidth.In the early stage, X.25 provided only the bandwidth of 64 kbit/s. Later, the digital data network (DDN) and Frame Relay (FR) increased the bandwidth to 2 Mbit/s. Synchronous digital hierarchy (SDH) and asynchronous transfer mode (ATM) further increased the bandwidth to 10 Gbit/s. Now, the current IP-based WANs provide 10 Gbit/s or even higher bandwidth.
This course describes the development history of WAN technologies, especially the implementations and configurations of Point-to-Point Protocol (PPP) and Point-to-Point Protocol over Ethernet (PPPoE).
55 Pages
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18 Network Management and O&M
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The ever expanding network and increasing network devices present a significant
challenge in managing networks effectively and providing high-quality network
services.
There are many network management and O&M methods, of which this course
describes some of the most common.
37 Pages
3760 Views
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1.21 MB
Uploaded: 2024-11-15
19. IPv6 Basics
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In the 1980s, the Internet Engineering Task Force (IETF) released RFC 791 –
Internet Protocol, which marks the standardization of IPv4. In the following decades, IPv4 has become one of the most popular protocols. Numerous people have developed various applications based on IPv4 and made various supplements and enhancements to IPv4, enabling the Internet to flourish.
However, with the expansion of the Internet and the development of new
technologies such as 5G and Internet of Things (IoT), IPv4 faces more and more
challenges. It is imperative to replace IPv4 with IPv6. This course describes the reasons for IPv4-to-IPv6 transition and basic IPv6 knowledge.
38 Pages
3754 Views
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1.36 MB
Uploaded: 2024-11-15
20. SDN and NFV Overview
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The open ecosystem of the computing industry brings booming development of
multiple fields, such as Commercial Off-the-Shelf (COTS), operating system,
virtualization, middleware, cloud computing, and software applications. The network industry is also seeking transformation and development. Software. Defined Networking (SDN) and Network Functions Virtualization (NFV) are mainly used.
This course aims to help engineers understand the development of SDN and NFV
and introduce Huawei SDN and NFV solutions.
51 Pages
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2.92 MB
Uploaded: 2024-11-15
21. Network Programmability and Automation
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New protocols, technologies, and delivery and O&M modes are emerging in the
network engineering field. Conventional networks face challenges from new
connection requirements, such as requirements for cloud computing and artificial
intelligence (AI). Enterprises are also pursuing service agility, flexibility, and elasticity. Against this backdrop, network automation becomes increasingly important.
Network programmability and automation is to simplify network configuration,
management, monitoring, and operations for engineers and improve deployment
and O&M efficiency. This course is to help network engineers understand Python
programming and implement network automation.
17 Pages
4926 Views
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471.79 KB
Uploaded: 2024-11-15
22. Typical Campus Network Architectures and Practices
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A broad range of places, such as campuses, office spaces, and shopping malls, are
covered by networks. You can access internal resources of your school, access
internal printers of your company to print documents, or access the Internet to
browse news through the networks. These networks belong to campus networks and are generally constructed by
enterprises or organizations. Campus networks not only improve the operational
efficiency of enterprises, but also provide network access services for external
users.This chapter describes the basic architecture of a campus network and details how to build a campus network.
25 Pages
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Uploaded: 2024-11-15
SZL 2111: HIV/AIDs - Full Notes
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General introduction: Public health and hygiene, human reproductive system, sex and sexuality. History of sexually transmitted diseases (STDs); History of Human Immunode ciency virus/ Acquired Immune deficiency Syndrome(HIV/AIDS), Comparative information on trends, global and local distribution, Justification of importance of course. Biology of HIV/AIDS; Overview of immune system, natural immunity to HIV/AIDS. The AIDS virus and its life cycle, disease progression, transmission and diagnosis.
Discordant couples. Treatment and Management; nutrition, prevention and control; Abstain, Be faithful, Condom use, Destigmatize HIV/AIDS (ABCD) methods and an-tiretroviral drugs and vaccines. Pregnancy and AIDS. Management of HIV/AIDS patients. Social and cultural practices: Religion and AIDS. Social stigma on HIV/AIDS. Behavioral change. Voluntary Counseling and Testing Services. Gender and HIV/AIDS. Drug and alcohol abuse and HIV/AIDS. Poverty and AIDS. Families and AIDS orphans. Government policies: Global policies of AIDS. Legal rights of AIDS patients. AIDS Impact: Family /society setup, population, agriculture, education, health, industry, development, economy and other sectors.
153 Pages
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Uploaded: 2024-11-15
SZL 2111: HIV/AIDs - Lesson 1
General introduction: Public health and hygiene, human reproductive system, sex and sexuality. History of sexually transmitted diseases (STDs); History of Human Immunodeficiency virus/Acquired Immune deficiency Syndrome (HIV/AIDS), Comparative information on trends, global and local distribution, Justification of importance of course. Biology of HIV/AIDS; Overview of immune system, natural immunity to HIV/AIDS. The AIDS virus and its life cycle, disease progression, transmission and diagnosis. Discordant couples. Treatment and Management; nutrition, prevention and control; Abstain, Be faithful, Condom use, Destigmatize HIV/AIDS (ABCD) methods
56 Pages
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Uploaded: 2024-11-15
SZL2111: HIV/AIDs - Sex education and Human sexuality
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Sex education, also called sexuality education or sex and relationships education.
It's the process of acquiring information and forming attitudes and beliefs about sex, sexual identity, relationships and intimacy. It is also about developing young people's skills so that they make informed choices about their behavior, and feel confident and competent about acting on these choices. It is widely accepted that young people have a right to sex education, partly because it is a means by which they are helped to protect themselves against abuse, exploitation, unintended pregnancies, sexually transmitted diseases and HIV/AIDS.
68 Pages
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SZL2111: HIV/AIDs - The Immune system
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Immune system is a system of biological structures and processes within an organism that protects against diseases by identifying and killing pathogens and tumor cells. The immune system is made up of organs that are involved in fighting invasion by foreign bodies.
24 Pages
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SZL 2111: HIV/AIDs - Biology of HIV
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HIV can’t grow or reproduce on its own. It requires cell of living organisms to infect & reproduce. HIV is specific to CD4+ cells in the human body i.e. cells with surface molecule called Cluster of Differentiation 4. Cells carrying this molecule are called CD4+ cells. Therefore HIV cant survive in the animal blood, because its only human blood that contains CD4+cells. HIV is a lentivirus. Like all viruses in this group it attacks the immune system. Lentiviruses are in turn part of a larger group of viruses called retroviruses. The term ”retrovirus” stems from the fact that these kinds of viruses are capable of copying RNA into DNA. The name lentivirus means slow virus. This is because they take such a longtime to produce any adverse effects in the body.
24 Pages
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Uploaded: 2024-11-15