802.11 / Cloud / Protocols and Ports Flashcards
Frequency? Max Speed? Max Distance? Channels? 802.11a
Frequency: 5GHz
Max Speed: 54 Mbps
Max Distance: 100ft
Channels: 24
Frequency? Max Speed? Max Distance? Channels? 802.11b
Frequency: 2.4GHz
Max Speed: 11 Mbps
Max Distance: 150ft
Channels: 11
Backwards Compatibility: None
Frequency? Max Speed? Max Distance? Channels? 802.11g
Frequency: 2.4GHz
Max Speed: 54 Mbps
Max Distance: 150ft
Channels: 11
Backwards Compatibility: 802.11b
Frequency? Max Speed? Max Distance? Channels? 802.11n
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.
Frequency? Max Speed? Max Distance? Channels? 802.11ac (Wi-Fi 5)
Frequency: 5GHz
Max Speed: 3.46 Gbps
Max Distance: 300ft
Channels: Depends on config
Backwards Compatibility: 802.11b/g/n
Frequency? Max Speed? Max Distance? Channels? 802.11ax (Wi-Fi 6)
Frequency: 2.4 || 5 GHz
Max Speed: 14 Gbps
Max Distance: 300ft
Channels: Depends on config
Backwards Compatibility: 802.11b/g/n/ac
Public Cloud
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.
Private Cloud
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.)
Community Cloud
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.
Hybrid Cloud
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.`
Metered Utilization
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.
Rapid Elasticity
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.
Infrastructure as a Service (IaaS)
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.
Platform as a Service(PaaS)
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.
Software as a Service(SaaS)
Saas delivers software applications to the client either over the internet or on a local area network.
Sandbox Virtualization
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.
Application Virtualization
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.
Cross-platform Virtualization
The process allows an operating system to access an application designed to run on a different operating system.
2G
Supports up to 144Kbps
Mainly used for text messaging.
EDGE (2.75G)
Supports 400-1000Kbps.
3G
Min 2Mbps or higher.
4G
Min 3-8 Mbps and over 100Mbps possible
5G
20Gb/sec
FTP (File Transfer Protocol)
Port Number?
20/21
FTP can transfer both binary and text files, including HTML, to another host.
ftp://
SSH (Secure Shell)
Port Number?
22
SSH allows for secure interactive control of remote systems. It’s encrypted. SSH can also be used to securely transfer files.
TelNet
Port Number?
23
TelNet is used to remotely connect to another system. All data is transmitted in cleartext. Because of this, TelNet is not used often.
SMTP (Simple Mail Transfer Protocol)
Port Number?
25
Used for sending emails.
DNS (Domain Name System)
Port Number?
53
DNS provides address-to-name resolution.
www.example.com–>186.166.81.69
DHCP (Dynamic Host Control Protocol)
Port Number?
67/68
Used to dynamically assign IP addresses in the network.
HTTP (Hypertext Transfer Protocol)
Port Number?
80
Used to exchange hypermedia through the WWW and intranets. Not secure!
POP3 (Post Office Protocol)
Port Number?
110
Used ti retrieve email from a remote server to a local client over an IP connection. Emails are downloaded to the client.
NetBIOS (Network Basic Input/ Output System) NetBT(over TCP/IP)
Port Number?
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.
IMAP (Internet Message Access Protocol)
Port Number?
143
IMAP is an email retrieval protocol. Messages remain on the remote mail server and are not automatically downloaded to a client system.
SNMP (Simple Network Management Protocol)
Port Number?
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.
LDAP (Lightweight Directory Access Protocol)
Port Number?
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.
HTTPS (Hypertext Transfer Protocol over Secure Socket Layer)
Port Number?
443
HTTPS is a secure form of HTTP that uses TLS to encrypt all communication.
SMB (Server Message Block) / CIFS (Common Internet File System)
Port Number?
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.
RDP (Remote Desktop Protocol)
Port Number?
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.
