R05 (Part 2) Flashcards
(11 cards)
What are web protocols responsible for?
Web protocols manage data formats:
Addressing (URLS/IPs),
Transport (HTTP,HTTPS).
Name common mail protocols and their purpose:
SMTP sends mail, IMAP and POP3 receive it.
What do routing protocols do?
Direct data across networks (e.g. RIP, OSPF, BGP).
What are application protocols used for?
Enable communication for specific services (e.g. FTP, DNS, DHCP).
What is cloud computing?
Internet-based delivery of computing services including servers, storage, and software.
Name the four types of cloud:
Public Cloud – Shared over the internet by providers - cost-effective and scalable.
Private Cloud – Dedicated to one organisation - meaning more control and security.
Hybrid Cloud – Mix of public and private - making it flexible and adaptable.
Multi-Cloud – Uses multiple cloud providers - which avoids lock-in, and boosts reliability.
What is middleware?
Software that connects applications and services (e.g. APIs, databases).
What are IaaS, PaaS, SaaS, and XaaS?
IaaS – Provides virtual hardware like servers and storage (e.g. AWS). MANAGE HARDWARE ONLY
PaaS – Offers tools to develop and deploy apps without managing infrastructure (e.g. Heroku). MANAGE APP & DATA
SaaS – Delivers software over the internet (e.g. Gmail, Microsoft 365). MANAGE NOTHING
XaaS – Covers all services delivered over the cloud.
How can systems be made resilient?
Backups
Updates
Disaster plans
Hardening
Upgrades
Redundancy
Staff training
Compare full, incremental, and differential backups:
Full: Backs up All data
Incremental: Backs up data changed since the last backup
Differential: Backs up data changed since the last full backup
Pros & cons of backups:
Full
•Easy restore
– Big size, slow backup
Incremental
•Saves space, quick backup
– Slower restore, risk of loss
Differential
•Faster restore, balanced
– More space than incremental
