2.4 Routing with Redundancy Flashcards
why is there a limit to how large a message can be
bc there’s a limit to how much data can be transmitted over a physical network through one woosh
what is the solution to the fact that u cant send too big of a message
IP Packets
IP Packet
a fundamental unit of data transmitted across computer networks
IP Packet structure
header and the data
how many bytes is the header of an IP Packet
20-24
how long is the data in an IP packet
depends on ur msg
header on ip packet
contains the source and destination and other identifying information of the message
data of an IP Packet
the actual content of the message
IP (definition)
describes how to route messages from one computer to another computer on the network
are all messages split into IP Packets
yes
routing
the process by which a IP packet sent from a source to destination
describe the process of routing a message (IP Packets)
1- send the first packet of the message to the nearest router
2- the packets destination is read by the router
3-the router sends the message to the net router that’s closest to the final destination
4- the router sends the message to the most efficient pathway
router
computing devices used in computer networks that helps move the packets along
how is a destination and source of an IP packet written
as an IP address form
how does a router decide which router to send the message to next
with a forwarding table
forwarding table
a table that consists of IP address prefixes that helps a router pick the next path (router to send it to) so that it can get to the destination faster
IP address prefix
the network portion of an IP address, indicating the range of addresses within a network
if two IP addresses have the same prefix what does it mean
they are on the same large network
Loke used a tool to track the route taken by an IP packet from their school computer to the IP address of the KhanAcademy.org server. If Loke runs the tool again, what output would he expect to see?
Routing on the Internet is dynamic. Each time a router receives a packet, it decides where to send it next based on a forwarding table and network conditions. That means that the next packet may follow a different sequence of stops.
Redundancy of a network increases when
when the availability of multiple paths increases
why is Redundancy of a network important
bc if one connection is shut down then the message can still be sent with a different route
fault tolerance system
a system that can experience failure(s) in its components but still continue operating properly
what is a major factor of fault tolerance
Redundancy in network routing paths
single point of failure
a component in the system that will bring the entire system down if the system fails
does the internet have a single point of failure
no
what is something common that disrupts internet systems
cable cuts
why doesn’t every single system have Redundancy
bc its expensive
