802.11 / Cloud / Protocols and Ports

Question 1

Frequency? Max Speed? Max Distance? Channels? 802.11a

Answer 1

Frequency: 5GHz
Max Speed: 54 Mbps
Max Distance: 100ft
Channels: 24

Question 2

Frequency? Max Speed? Max Distance? Channels? 802.11b

Answer 2

Frequency: 2.4GHz
Max Speed: 11 Mbps
Max Distance: 150ft
Channels: 11
Backwards Compatibility: None

Question 3

Frequency? Max Speed? Max Distance? Channels? 802.11g

Answer 3

Frequency: 2.4GHz
Max Speed: 54 Mbps
Max Distance: 150ft
Channels: 11
Backwards Compatibility: 802.11b

Question 4

Frequency? Max Speed? Max Distance? Channels? 802.11n

Answer 4

Frequency: 2.4GHz || 5GHz
Max Speed: 600 Mbps
Max Distance: 1200ft
Channels: 2.4 GHz = 11 & 5 GHz = 23
Backwards Compatibility: 802.11a/b/g depending on implementation.

Question 5

Frequency? Max Speed? Max Distance? Channels? 802.11ac (Wi-Fi 5)

Answer 5

Frequency: 5GHz
Max Speed: 3.46 Gbps
Max Distance: 300ft
Channels: Depends on config
Backwards Compatibility: 802.11b/g/n

Question 6

Frequency? Max Speed? Max Distance? Channels? 802.11ax (Wi-Fi 6)

Answer 6

Frequency: 2.4 || 5 GHz
Max Speed: 14 Gbps
Max Distance: 300ft
Channels: Depends on config
Backwards Compatibility: 802.11b/g/n/ac

Question 7

Public Cloud

Answer 7

A cloud that can be accessed by anyone.
* The service provider may not require a fee for using these resources. *

Example: Google provides many publicly accessible cloud applications, such as Gmail and Google Docs.

Question 8

Private Cloud

Answer 8

A cloud that provides resources to a single organization. Access is granted to only the users within the organization.
( An organization commonly enters into an agreement with a cloud service provider, which provides secure access to cloud-based resources. The organization’s data is kept separate and secure from any other organization using the same provider.)

Question 9

Community Cloud

Answer 9

A cloud designed to be shared by several organizations.
Access is granted only to the users within the organizations who are sharing the community cloud infrastructure. Community clouds can be hosted internally, with each organization sharing the cost of implementation and maintenance.

Question 10

Hybrid Cloud

Answer 10

A cloud is a combination of public, private, and community cloud resources from different service providers.
The goal behind a hybrid cloud is to expand the functionality of a given cloud service by integrating it with other cloud services.`

Question 11

Metered Utilization

Answer 11

Pay and use computing power uses on-demand computing (ODC) or metering of services. ODC allows resources to be provided on an as-needed and when-needed basis.

Question 12

Rapid Elasticity

Answer 12

Rapid elasticity is the ability to provide scalable services. In order words, rapid elasticity allows users to automatically request additional space in the cloud or other types of services.

Question 13

Infrastructure as a Service (IaaS)

Answer 13

IaaS delivers infrastructure(such as processing, storage, networks, and virtual environments) to the client.
The client deploys and runs software without purchasing servers, data center space, or network equipment.

Question 14

Platform as a Service(PaaS)

Answer 14

PaaS delivers everything a developer needs to build an application. The deployment comes without the cost and complexity of buying and managing the underlying hardware and software layers.

Question 15

Software as a Service(SaaS)

Answer 15

Saas delivers software applications to the client either over the internet or on a local area network.

Question 16

Sandbox Virtualization

Answer 16

The process of creating an isolated testing environment. Virtualization lets you easily create a sandbox by isolating components from the production network.

Using a virtualized sandbox (sometimes known as a playground) gives network administrators and developers a safe place to create new software, test software development, install new software, or update existing software without risking the production network.

Question 17

Application Virtualization

Answer 17

The process of installing and accessing applications virtually. This can help reduce licensing costs; increase accessibility for local and remote employees; and make it easier to install and maintain applications.

Question 18

Cross-platform Virtualization

Answer 18

The process allows an operating system to access an application designed to run on a different operating system.

Question 19

2G

Answer 19

Supports up to 144Kbps
Mainly used for text messaging.

Question 20

EDGE (2.75G)

Answer 20

Supports 400-1000Kbps.

Question 21

3G

Answer 21

Min 2Mbps or higher.

Question 22

4G

Answer 22

Min 3-8 Mbps and over 100Mbps possible

Question 23

5G

Answer 23

20Gb/sec

Question 24

FTP (File Transfer Protocol)

Port Number?

Answer 24

20/21

FTP can transfer both binary and text files, including HTML, to another host.
ftp://

Question 25

SSH (Secure Shell)

Port Number?

Answer 25

22

SSH allows for secure interactive control of remote systems. It’s encrypted. SSH can also be used to securely transfer files.

Question 26

TelNet

Port Number?

Answer 26

23

TelNet is used to remotely connect to another system. All data is transmitted in cleartext. Because of this, TelNet is not used often.

Question 27

SMTP (Simple Mail Transfer Protocol)

Port Number?

Answer 27

25

Used for sending emails.

Question 28

DNS (Domain Name System)

Port Number?

Answer 28

53

DNS provides address-to-name resolution.
www.example.com–>186.166.81.69

Question 29

DHCP (Dynamic Host Control Protocol)

Port Number?

Answer 29

67/68

Used to dynamically assign IP addresses in the network.

Question 30

HTTP (Hypertext Transfer Protocol)

Port Number?

Answer 30

80

Used to exchange hypermedia through the WWW and intranets. Not secure!

Question 31

POP3 (Post Office Protocol)

Port Number?

Answer 31

110

Used ti retrieve email from a remote server to a local client over an IP connection. Emails are downloaded to the client.

Question 32

NetBIOS (Network Basic Input/ Output System) NetBT(over TCP/IP)

Port Number?

Answer 32

137/139

NetBIOS was used in early Windows networks. Because NetBIOS is a non-routable protocol, it was often combined with IP to enable internetwork communications.

NetBIOS over TCP/IP is used to allow older computers and applications that rely on NetBIOS to communicate on a TCP/IP network.

Question 33

IMAP (Internet Message Access Protocol)

Port Number?

Answer 33

143

IMAP is an email retrieval protocol. Messages remain on the remote mail server and are not automatically downloaded to a client system.

Question 34

SNMP (Simple Network Management Protocol)

Port Number?

Answer 34

161/162

Used to monitor and manage network devices. SNMP agents can be installed on network devices such as PCs, switches, firewalls, printers and routers.

Question 35

LDAP (Lightweight Directory Access Protocol)

Port Number?

Answer 35

389

Network information such as usernames, passwords, computer accounts, group policies, and other user and device information are stored in a directory service such as Microsoft’s Active Directory.

Question 36

HTTPS (Hypertext Transfer Protocol over Secure Socket Layer)

Port Number?

Answer 36

443

HTTPS is a secure form of HTTP that uses TLS to encrypt all communication.

Question 37

SMB (Server Message Block) / CIFS (Common Internet File System)

Port Number?

Answer 37

445

SMB enables the sharing folder and printers on the network. Using SMB, remote users can access files in a shared folder on a server or workstation.

Microsoft uses SMB to implement CIFS to share data across a Windows based network.

Question 38

RDP (Remote Desktop Protocol)

Port Number?

Answer 38

3389

RDP is a Microsoft protocol that allows a user to view and use the graphical desktop of a remote computer system as if they were sitting in front of it.