Networking: Troubleshooting and Future of Networking Flashcards
Cloud computing
The concept and technological approach of accessing data, using applications, storing files, etc. from anywhere in the world as long as you have an internet connection
Error detection
The ability for a protocol or program to determine that something went wrong
Error recovery
The ability for a protocol or program to attempt to fix an error
Flow label field
20-bit field that’s used in conjunction with the traffic class field for routers to make decisions about the quality of service level for a specific datagram
Hop limit field
An 8-bit field that’s identical in purpose to the TTL field in an IPv4 header
Host file
A simple text file that consists of one or more lines, each of which contains a hostname and an IP address
Hybrid cloud
A cloud computing environment that combines on-premises private cloud resources with public cloud resources
Hypervisor
A piece of software that runs and manages virtual machines while also offering guests a virtual operating platform that’s indistinguishable from actual hardware
ICMP
Internet control message protocol is used by router or remote hosts to communicate error messages when network problems prevent delivery of IP packets
ICMP payload
Piece of the packet which lets the recipient of the message know which of their transmissions caused the error being reported
Infrastructure as a Service (IaaS)
A subset of cloud computing where a network and servers are provided for customers to run their services
IPv6 tunnel brokers
Companies that provide IPv6 tunneling endpoints for you, so you don’t have to introduce additional equipment to your network
IPv6 tunnel
IPv6 tunnel servers on either end of a connection take incoming IPv6 traffic and encapsulate it within traditional IPv4 datagrams
Link-local unicast address
Allow for local network segment communications and are configured based upon a host’s MAC address
Loopback address
An IP address that always points to itself. This type of address is used to test internal pathing through the TCP/IP protocols
Multicast
A way of addressing groups of hosts all at once
Next header field
Defines what kind of header is immediately after this current one
Payload length field
16-bit field that defines how long the data payload section of the datagram is
Platform as a service
A subset of cloud computing where a platform is provided for customers to run their services
Private cloud
When a company owns the services and the rest of the cloud infrastructure, whether on-site or in a remote data center
Public cloud
The cloud services provided by a third party
Public DNS servers
Name servers specifically set up so that anyone can use them for free
Registrar
An organization responsible for assigning individual domain names to other organizations or individuals
Software as a Service (SaaS)
A way of licensing the use of software to others while keeping that software centrally hosted and managed
Traffic class field
An 8-bit field that defines the type of traffic contained within the IP datagram and allows for different classes of traffic to receive different priorities
Version field
First field in an IP header that specifies the version of IP
Virtualization
A single physical machine called a host runs many individual virtual instances called guests
