Network Architectures Flashcards
Centralized Network Architecture
all data is kept on mainframe, user comp only takes I/O.
EX: Cloud Computing
Decentralized Network Architecture
Computing power is in device, not data center. Populaized in 1980s.
Has many problems b/c few backups and bad local security.
Client/Server Network Architecture
shares centralized server and decentralized client computer. Used by enterprises.
Advanced user interfaces, but data inconsistency and upgrades are difficult.
Peer to Peer Network Architecture
client comp acts as server and client. More resource heavy, but most systems allow this by default between OSes
Virtualization
Converts hardware resource to software.
What is a Hypervisor?
creates virtual hardware for devices. Resource traffic cop.
Type 1 Hypervisor
Installed on a server. VMWare, ESXi, KVM. Admin is done on a different host.
Type 2 Hypervisor
Run as app on computer. All requests run through comp OS.
Con: Degraded performance
What is an IaaS and what services does it provide?
Infrastructure as as Service. Provides: Hypervisors, servers + storage, Physical networks. Most barebones of all Cloud Service Models. User responsible for backups.
What is an PaaS and what services does it provide?
Platform as a Service. Provides: Physical networks, servers + storage, hypervisors, virtual networks, OS.
What is an SaaS and what services does it provide?
Software as a Service. Provides: Physical Networks, servers + storage, hypervisors, virtual networks, OS, Applications. (Services like Facebook, Office 365, ect.)
