(220-1101) Flashcards
(39 cards)
Port 20
File Transfer Protocol (FTP)
Port 53
Domain Name System (DNS)
Port 25, 587
Simple Mail Transfer Protocol (SMTP)
Port 110
Post Office Protocol 3 (POP3)
Port 143
Internet Mail Access Protocol (IMAP)
Port 161/162
Simple Network Management Protocol (SNMP)
Port 389
Lightweight Directory Access Protocol (LDAP)
RAID 0
Striping: Stores data such as a file across multiple drives. Instead of writing all data to one disc, it is split equally between all drives in blocks. But if one drive is lost, all data is effectively lost, thus there is zero redundancy.
RAID 1
Mirroring: All blocks of data are duplicated and stored across all drives, at the cost of more disc utilization, effectively requiring double the storage or more depending on the amount of drives hosting the files. However, if a drive is lost in the array, all data is preserved.
RAID 5
Striping with Parity: Also stores data in blocks split equally across drives, but with parity. Parity is an additional block that allows data to be rebuilt across all drives in the event of a malfunction.
RJA11
6-position, 2 connector wire used on old dsl and telephone connections.
RAID 10 (1+0)
Stripe of Mirrors: Abundantly redundant. Data is spread equally across all drives. The same stripes or blocks are then duplicated on another drive. Minimum of four drives required to use.
RJ45
8-position, 8 conductor modular connector used for all modern internet connections (ethernet).
F-Connector
A type of coaxial cable used today for cable TV.
Punchdown Block
A wire patch panel commonly used in data centers, allowing users to connect to the network, where wires are ‘punched’ into a connecting block located on the punchdown block.
Molex Connector
Standard 4-pin connector used to power fans, lighting, optical drives and other peripherals in a computer. Typically operates at +5v or +12v.
DB-9 Connector
Mostly obsolete 9-pin connector primarily used today for serial communications, such as switches, routers, bridges, etc., allowing for command-line access to these devices.
Platform as a Service (PaaS)
Providers host development tools on their infrastructures. Users access these tools over the internet using APIs, web portals, or gateway software.
Software as a Service (SaaS)
In this service model, the service provider hosts the software so you don’t need to install it, manage it, or buy a single piece of hardware for it. The service provider manages all the technical issues including data, middleware, servers, and storage.
Infrastructure as a Service (IaaS)
In this model, a third-party provider hosts and maintains core infrastructure, including hardware, software, servers, and storage. Clients typically pay on a per-use basis.
Public Cloud
In a public cloud, the services are delivered to the client via the internet from a third-party service provider. Public clouds offer an IT infrastructure that’s scalable and flexible, with computational resources being shared among all users. Examples include AWS, Google Cloud Platform (GCP), and Microsoft Azure.
Private Cloud
This model of cloud computing provides a similar level of flexibility, scalability, and storage as the public cloud, but it is dedicated to a single organization, meaning the resources are not shared with others. Private clouds are often used by government agencies, financial institutions, or other medium to large-size organizations with business-critical operations seeking enhanced control over their environment. Examples include VMware’s Software Defined Data Center (SDDC), IBM Cloud Private, and OpenStack.
Hybrid Cloud
A combination of a private cloud combined with the use of public cloud services where one or several touch points exist between the environments. This model allows organizations to have the flexibility and benefits of the public cloud for non-sensitive operations and the protection of a private cloud for mission-critical or sensitive operations. Many enterprises practice this model.
Port 993
Internet Message Access Protocol (IMAP) with SSL
