Lesson Flashcards
What is a computer network?
A computer network or data network is a digital telecommunication network which allows nodes to share resources.
How do networked computing devices exchange data?
Networked computing devices exchange data with each other using a data link.
What are the two types of media used to establish connections between nodes?
Connections between nodes are established using either cable media or wireless media.
What are the main types of networks based on their area of operation?
Wide Area Network (WAN), Metropolitan Area Network (MAN), Personal Area Network (PAN), Local Area Network (LAN).
What is a networking device?
Equipment that connects directly to a network segment is referred to as a device.
What are the two classifications of networking devices?
End-user devices and network devices.
What are examples of end-user devices?
Computers, printers, scanners, and other devices that provide services directly to the user.
What is a Network Interface Card (NIC)?
A NIC is a printed circuit board that provides network communication capabilities to and from a personal computer.
What is Packet Tracer?
Packet Tracer is a cross-platform visual simulation tool designed by Cisco Systems that allows users to create network topologies and imitate modern computer networks.
What are some examples of network devices?
Repeater, Bridge, Hub, Workgroup Switch, Router.
What is subnetting?
Subnetting is the division of a network into several smaller subnetworks, each having its own subnetwork address.
What is supernetting?
Supernetting allows an organization to combine several class C addresses to create a larger range of addresses.
What is Classless Interdomain Routing (CIDR)?
CIDR is a technique devised to reduce the number of routing table entries by using a supernet mask and the lowest network address in a group.
What is the function of a router?
A router is a layer 3 device that connects different networks and performs packet filtering and best path selection.
What are the three types of routing?
Default routing, Static routing, Dynamic routing.
What is dynamic routing?
Dynamic routing uses a routing protocol to allow one router to share information with other routers.
What is Routing Information Protocol (RIP)?
RIP is a distance vector routing protocol that uses hop count as the metric for path selection.
What is Open Shortest Path First (OSPF)?
OSPF is a dynamic Interior Gateway Protocol that uses a link state algorithm within a network.
What is network security?
Network security is a level of guarantee that all machines in a network are working optimally and users possess only the rights granted to them.
What are some basic network security measures?
Preventing unauthorized access, securing data, and guaranteeing uninterrupted services.
What is the need for network security?
The need arises from the increasing number of hackers and the availability of tools that make hacking easier.
What is Wi-Fi Protected Access (WPA)?
WPA encrypts information and authenticates users to ensure only authorized access to the network.
What is Wired Equivalent Privacy (WEP)?
WEP is an older network security method that encrypts information but is no longer recommended due to its vulnerability.
What are the types of authentication?
One-factor authentication, Two-factor authentication, Three-factor authentication.
