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CISCO CCNA (2024) > Terms > Flashcards

Terms Flashcards

Understanding abbreviations/terms

1
Q

What does “TCP/IP” stand for?

A

Transmission Control Protocol/Internet Protocol

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2
Q

What does “OSI” stand for?

A

Open System Interconnection

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3
Q

What does “LAN” stand for?

A

Local Area Network (or Wi-Fi)

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4
Q

What does “DSL” stand for?

A

Digital Subscriber Line

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5
Q

What does “UDP” stand for?

A

User Datagram Protocol

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6
Q

What does “IP” stand for?

A

Internet Protocol

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7
Q

What is the definition of “IP/Internet Protocol”?

A

Routable protocol responsible for IP addressing, routing, fragmentation and reassembly of packets.

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8
Q

What does “ARP” stand for?

A

Address Resolution Protocol

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9
Q

What is the definition of “ARP/Address Resolution Protocol”

A

Address Resolution Protocol (ARP) is a protocol that connects an ever-changing Internet Protocol (IP) address to a fixed physical machine address, also known as a media access control (MAC) address, in a local-area network (LAN).

Responsible for the resolution of the internet layer address to the network interface layer address such as a hardware address.

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10
Q

What does “ICMP” stand for?

A

Internet Control Message Protocol

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11
Q

What is the definition of “ICMP/Internet Control Message Protocol”?

A

Responsible for providing diagnostic functions and reporting errors due to the unsuccessful delivery of IP packets.

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12
Q

What does “IGMP” stand for?

A

Internet Group Management Protocol

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13
Q

What is the definition of “IGMP/Internet Group Management Protocol”?

A

Responsible for management of IP multicast groups.

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14
Q

What is the definition of “IP Host”?

A

The term IP host refers to any device, regardless of size or power, that has an IP address and connects to any TCP/IP Network.

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15
Q

What does “DDN” stand for?

A

Dotted-Decimal Notation

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16
Q

What is an example of “DDN/Dotted-Decimal Notation”

A

1.1.1.1 or 192.168.1.36

17
Q

What does “ISP” stand for?

A

Internet Service Provider

18
Q

What is the definition of “Adjacent-Layer Interaction”?

A

On a single device (Computer), one layer provides a service to a higher layer. The software or hardware that implements the higher layer requests that the next lower layer performs the needed function.

On the same device.

19
Q

What is the definition of “Same-Layer Interaction”?

A

A protocol (an agreed set of rules) is used to communicate with the same layer on two (or more) devices (computers). The protocol defined by each layer uses a header that is transmitted between the devices to communicate what each device wants to do. Header information added by a layer of the sending computer is processed by the same layer of the receiving computer.

On different devices.

20
Q

What is the definition of “IP Packet/IP Routing”?

A

The process of forwarding an IP packet.

21
Q

What is the definition of “Computer Network”?

A

A computer network is a digital telecommunications network which allows nodes to share resources.

22
Q

Describe a “Router”.

A

Routers have fewer network interfaces than switches.
Routers are used to provide connectivity between LANs (Local Area Networks).
Routers are therefore used to send data over the internet.

23
Q

Describe a “Switch”.

A

Switches are used to forward traffic in a LAN (Local Area Network).
Switches have many network interfaces/ports for end hosts to connect to (usually 24+).
Switches provide connectivity to hosts with the same LAN (Local Area Network).
Switches do not provide connectivity between LANs/Over the internet.

24
Q

Describe a “Firewall”.

A

Firewalls monitor and control network traffic based on configured rules.
Firewalls can be placed “Inside” the network or “Outside” the network.
Firewalls are also known as “Next-Generation (Gen) Firewalls” when they include more modern and advanced filtering capabilities.

25
Q

Describe a “Network Firewall”.

A

Network Firewalls are hardware devices that filter traffic between networks.

26
Q

Describe a “Host-Based Firewall”.

A

Host-Based Firewalls are software applications that filter traffic entering an exiting a host machine, like a PC.

27
Q

Describe a “Server”.

A

A server is a device that provides functions or services for clients.

Server and Clients are referred to as “End Hosts” or “Endpoints”.

28
Q

Describe a “Client”.

A

A client is a device that accesses a service made available by a server.

Server and Clients are referred to as “End Hosts” or “Endpoints”.

29
Q

What is the definition of a “Bit”?

A
30
Q

What does “UTP” stand for?

A

Unshielded = Wires have no metallic shield which can make them vulnerable to electrical interference.

Twisted = 4pairs of cables, twisted together. Twist helps protect against EMI (Electromagnetic Interference)

Pair

CISCO CCNA (2024) (5 decks)

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