CCNA Security IINS Exam Topics | 1.4 Describe Network Topologies Day 4

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1.4 Describe network topologies

1.4.a Describe Campus Area Network

A campus area network

(CAN) is a network of multiple interconnected local area networks (LAN) in a limited geographical area. A CAN is smaller than a wide area network (WAN) or metropolitan area network (MAN). They are mostly used in universities or a corporation with multiple building in the same area.

1.4.b Cloud, wide area network (WAN)

Cloud networking

Cloud networking (and Cloud based networking) is a term describing the access of networking resources from a centralized third-party provider using Wide Area Networking (WAN) or Internet-based access technologies.


A WAN connects more than one LAN and is used for larger geographical areas. WANs are similar to a banking system, where hundreds of branches in different cities are connected with each other in order to share their official data.

1.4.c Data center

Data centers

are often served by communications networks that help aggregate data and allow them to flow through the system. This can be done in many ways, and some models have emerged for data center topology.

1.4.d Small office/home office (SOHO)


It is often thought of as being the smallest of small businesses. It is a privately owned and operated business or individuals who are self-employed.

1.4.e Network security for a virtual environment

SaaS – Software as a Service

There are plenty of well-known applications that you are using daily like Dropbox, OneDrive and more that deliver services over the internet. Users can access them through an application or the web browsers, thanks to APIs.
Advantage, the multi-platform approach where users can access their data on different devices.
The vendor controls software and security.

PaaS – Platform as a Service

It is a cloud computing model in which a third-party provider delivers hardware and software tools — usually those needed for application development — to users over the internet. A PaaS provider hosts the hardware and software on its own infrastructure.

IaaS – Infrastructure as a Service:

Infrastructure as a service (IaaS) A method that provides network resources such as for storage and allow the client can deploy software and add network components such as firewalls.

  • You provide your own security
  • Vendor protects others from you
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