Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Network+ > Section 1.1-1.2-1.3 > Flashcards

Section 1.1-1.2-1.3 Flashcards

1
Q

OSI Model Definition

A

Open System Interconnection Reference Model

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

OSI Model 7 Layers

A

Layer 1: Physical Layer
Layer 2: Data Link Layer
Layer 3: Network Layer
Layer 4: Transport Layer
Layer 5: Session Layer
Layer 6: Presentation Layer
Layer 7: Application Layer

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

OSI Model Layer 1

A

Physical Layer
It’s the physics of a network: Signaling, cabling, connectors

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

OSI Model Layer 1 Responsibility

A

The physical layer of the OSI model is responsible for the transmission and receipt of the signals that represent bits of data from one node to another node.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

OSI Model Layer 2

A

Data Link Layer
The switching layer (frame, mac address, EUI-48, EUI-64, Switch, ARP Table)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

OSI Model Layer 2 Responsibility

A

The data link layer is responsible for transferring data between nodes on the same logical segment.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

OSI Model Layer 3

A

Network Layer
The routing Layer (IP, router, packet)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

OSI Model Layer 3 Responsibility

A

The network layer is responsible for moving data around a network of networks, known as the Internet.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

OSI Model Layer 4

A

Transport Layer
The “post office” layer (TCP segment, UDP datagram)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

OSI Model Layer 4 Responsibility

A

The transport layer identifies each type of network application by assigning it a port number.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

OSI Model Layer 5

A

Session Layer
Communication between devices (control protocols, tunneling protocols)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

OSI Model Layer 5 Responsibility

A

The session layer represents functions that administer the process of establishing a dialog, managing data transfer, and then ending (or tearing down) the session.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

OSI Model Layer 6

A

Presentation Layer
Encoding and Encryption (SSL/TLS)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

OSI Model Layer 6 Responsibility

A

The Presentation layer transforms data between the format required for the network and the format required for the application. For example the Presentation layer is used for character set conversion.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

OSI Model Layer 7

A

Application Layer
The layer we see - Google Mail, Twitter, Facebook

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

OSI Model Layer 7 Responsibility

A

The application layer receives the translated data. This protocol does not encapsulate any other protocols or provide services to any protocol.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What protocols are used in OSI layer 7?

A

The application layer uses the following protocols: HTTP, SMTP and FTP.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What is a bridge?

A

A bridge is a hardware appliance or software application that connects different networks and treats them as if they were one network.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What is the purpose of a bridge?

A

The bridge creates a link between two physical segments so that hosts in segment A can send and receive messages to hosts in segment B.

Bridges perform on Layer 2 (Data Link Layer).

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What is a router?

A

A router is a hardware appliance or application that connects different networks for communication purposes but keeps them separate. A router is a layer 3 device and communication between networks is done with routing tables.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What is a switch ?

A

A switch is a layer 2 device, that connects systems within a single network subnet.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

What is a firewall?

A

A firewall is a hardware device or application that is used to protect a network from another.
Firewalls are principally used to implement security zones, such as intranet, screened subnet topology and internet.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

What is a TCP Flag?

A

A TCP Flag is a specific bit within the TCP header that controls the flow of data.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

What are the main TCP flags?

A

SYN: Synchronize sequence numbers
PSH: Push the data to the application without buffering
RST - Reset the connection
FIN - Last packet from the sender

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

What is Maximum Transmission Unit (MTU)?

A

Maximum IP Packet to Transmit

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

How to troubleshoot MTU?

A

Ping with DF (Dont Fragment) and force a maximum size of 1472.
Windows: ping -f -l 1472 8.8.8.8

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

What are Network Topologies used for?

A

Planning a network to understand signal flow

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

5 Types of Network Topologies

A

Star
Ring
Bus
Mesh
Hybrid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

Define Star Topology

A

All devices (nodes) are connected to a central hub or switch or routes.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

Define Ring Topology

A

Each device is connected to exactly two other devices forming a circular pathway for data to travel.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

Define Bus Topology

A

All devices (nodes) are connected to a single central cable known as the bus. Only one node can be active at a time.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

Define Mesh Topology

A

Each device is connected to every other device in the network.
Two types of Mesh:
- Fully connected and Partially connected

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

Define Hybrid Topology

A

A combination of one or more physical topologies

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

3 Types of Wireless Topologies

A

Infrastructure
Ad Hoc Networking
Mesh

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

Define Infrastructure Wireless Topology

A

Al devices communicate through an access point.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
36
Q

Define Ad Hoc Wireless Topology

A

No preexisting infrastructure. Devices communicate among themselves.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
37
Q

Define Mesh Wireless Topology

A

Ad Hoc devices work together to form a Mesh “Cloud”

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
38
Q

Peer to Peer network type definition

A

All devices are both clients and servers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
39
Q

Client-server network type definition

A

Central server used for all clients to talk to. No client to client communication

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
40
Q

LAN (Local Area Network)

A

Network that connects devices within a building or a limited number of buildings
Can be done through Ethernet or Wireless (802.11)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
41
Q

MAN (metropolitan area network)

A

A metropolitan area network is a network that covers an area equivalent to a city. A MAN uses a service category such as ELAN which establishes a mesh topology.

42
Q

WAN (Wide Area Network)

A

Generally connects LANs across a distance (cities, countries)

43
Q

Types of WAN Networks

A

Point to Point
Terrestrial and non terrestrial

44
Q

What is WLAN

A

Wireless LAN. Also referenced as a hotspot.

45
Q

PAN (Personal Area Network)

A

A personal area network (PAN) is a close-range network link between a variety of devices. For example, two smart phones connected to each other via Bluetooth are creating a PAN.

46
Q

CAN (Campus Area Network)

A

The term campus area network (CAN) is sometimes used for a LAN that spans multiple nearby buildings. This high-speed network can connect directly with all students in all the buildings and dormitories.

47
Q

What is NAS?

A

Definition: Network Attached Storage.
- file-based storage system connected to a LAN

48
Q

What is SAN?

A

Definition: Storage Area Network
- block-based storage system connected to a dedicated high-speed network
- A SAN is isolated from the main network. It is only accessed by servers, not by client PCs and laptops.

49
Q

What is MPLS?

A

Multi protocol label switching (MPLS) can operate as an overlay network to configure point to point or point to multipoint links between nodes regardless of the underlying physical and data link topologies.

50
Q

What is mGRE?

A

Definition: Multipoint Generic Router Encapsulation
- mGRE is a tunneling protocol that allows a single tunnel interface to connect to multiple remote sites, making it ideal for hub-and-spoke topologies
- mGRE is used a lot with Dynamic Multipoint VPN (DMVPN)

51
Q

What is SD-WAN?

A

Definition: Software Defined Networking in a Wide Area Network
- (SDWAN) is an overlay network that provisions a corporate WAN across multiple locations and facilitates secure access to the cloud directly from a remote location.

52
Q

What is Demarcation point?

A

The demarcation point is the boundary where the responsibility for the network transitions from the service provider to the customer. It is typically located where the service provider’s infrastructure meets the customer’s internal network.
- It could be at the server room of an office.

53
Q

What is a Smartjack?

A

Also known as NIU (Network Interface Unit)
It is a type of network interface device used to connect customer sites equipment to the provider’s network. It is usually installed at the demarcation point.

What makes a Smartjack “smart” is its ability to perform diagnostics and testing on the network connection, allowing service providers to remotely monitor, test, and troubleshoot the connection without needing to send a technician to the customer’s site.

54
Q

What are virtual networks?

A

A virtual network is a software based representation of a physical network.

55
Q

What is Hypervisor?

A

Virtual Machines (VMs) manager.

56
Q

What is NFV (Network Function Virtualization)?

A

NFV replaces physical network devices (like routers, switches, firewalls) with virtual versions.

57
Q

What is vSwitch?

A

A vSwitch is a virtual version of a physical network switch. It is used to connect virtual machines within the same server and allow them to communicate with each other.

58
Q

Explain Ethernet encapsulation

A

Ethernet encapsulates the payload from the higher level protocols within a protocol data unit (PDU) called a frame. The ethernet header encapsulates onto a packet at the data link layer.

59
Q

Explain Transport Layer encapsulation

A

The transport layer encapsulates the packet in the Transport Control Protocol (TCP) header or User Datagram Protocol (UDP) header.

60
Q

What is a repeater?

A

A repeater is a layer 1 device that takes a signal and repeats it to the devices connected to it. Repeaters maintain signal intergrity and amplitude.

61
Q

What is an IDS?

A

An IDS is an Intrusion Detection System that detects malicious activity.

62
Q

Wat is an IPS?

A

An IPS is an intrusion prevention system that monitors suspicious network or system traffic and reacts in real time to block it.

63
Q

What is a multilayer switch?

A

A multilayer switch routes based on the contents of packets at layer 3 and up and more effectively in a VLAN environment.

64
Q

Explain Physical Network Topology

A

Physical network topology describes the placement of nodes and how they are connected by the network media.

Example; t’is the actual layout of the network’s hardware—the cables, devices, and how they are connected. It’s what you can touch and see.

65
Q

Explain Logical Network Topology

A

Logical Network topology describes the flow of data through the network regardless of its physical layout.

66
Q

What is a vNIC?

A

Virtual network adapter

67
Q

What is a DSL?

A

Digital Subscriber Line is a technology for transferring data over voice telephone lines.
- Often referred to as the local loop

68
Q

What is a leased line?

A

A leased line is a dedicated, private connection that provides a continuous, high-performance link between two locations.

  • For example, using a leased line you can always get the same download/upload speed for network activities.
69
Q

What is a Bix?

A

Bix panels have blades that are adjustable on one end of the punch tool.

70
Q

Explain 110 punch block

A

Installer mostly use 110 format punch blocks for LAN technology and RJ-45 connections. They have a set blade on one end of the punch tool.

70
Q

Explain 66 punch block

A

Installers use 66 format punch blocks in telecom installations and phone connectivity panels. They have a blade on the side of the punch tool.

71
Q

What is a Krone?

A

Krone panels have scissor like function on the front of the punch tool.

72
Q

Explain Twinax Cable

A

Twinax Cable is for data center 10 GbE and 40 GbE interconnections of up to about 5 meters for passive cable types and 10 meters for active cable types.

72
Q

Explain Coaxial Cable

A

Coaxial is used for cable tv connections.

72
Q

10GBASE-LR

A

Ethernet over Fiber uses the IEEE 10GBASE-ER specification

73
Q

Explain Cat 6A Cables

A

Cat 6A cable supports 10Gbps over 100 meters. RJ-45 connectors terminate the cable.

74
Q

Explain Cat 6 cables

A

Cat 6 cable can support 10 Gbps over 55 meters.

75
Q

Explain Cat 7 cables

A

Cat 7 cable can support 10GbE for up to 100 meters. GG45 or Tera connectors terminate cat 7 cables.

76
Q

Explain 1000BASE-LX

A

The 1000BASE-LX is a gigabit ethernet standard and supports 1 Gbps and a distance of 5 km using a single mode fiber.

76
Q

Explain Cat 8 cables

A

Only used for top of rack connections between adjacent appliances.

77
Q

Explain 100BASE-FX

A

100BASE-FX goes up to 100Mbps for a distance of up to 2km

78
Q

Explain DWDM

A

Dense Wavelength Division Multiplexing provisions greater number of channels (20,40,80 and 160).

79
Q

Explain CWDM

A

Coarse Wavelength Division Multiplexing supports up to 16 wavelengths and is able to deploy 4 or 8 bidirectional channels over a single fiber strand.

79
Q

Explain 100BASE-SX

A

100BASE-SX goes up to 100 Mbps for a distance of up to 300 meters.

80
Q

Explain 10GBASE-SR

A

10GBASE-SR supports 10 gigabit for a distance of up to 300 meters.

81
Q

Explain 40GBASE-T

A

Gigabit ethernet working over cat 8 cable with speeds up to 40 Gbps and a distance of 30 meters

82
Q

Explain 10GBASE-T

A

Fast Ethernet working over Cat 6 cable for speeds up to 10 gigabits

83
Q

Explain LC

A

LC (Local Connector) is a small form fiber optic connector. Smaller than SC.

84
Q

Explain SC

A

Subscriber connector is a connector used with fiber optic cabling. Bigger than LC.

84
Q

Explain SFP

A

Small Form Factor (SFP) uses local connectors (LCs)

85
Q

Explain UPC

A

Ultra Physical Contact (UPC) fiber connector defines that the cable and connector are polished to the highest standard.

86
Q

Explain APC

A

Angled Physical Contact are designed for angled connections that are not fiber connectors. Usually used to carry analog signaling.

87
Q

What are the defined methods for terminating Ethernet connectors?

A

T568A is mandated but T568B is more widely deployed.

88
Q
A
89
Q
A
90
Q
A
91
Q
A
92
Q
A
93
Q
A
94
Q
A

Network+ (3 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions