Table of Contents
- 1 How does a packet know the destination computer?
- 2 What does the router use to determine whether it should send a packet to a computer associated with it?
- 3 How does a router forward data packets from one network to another?
- 4 How do routers determine where a packet needs to go quizlet?
- 5 What does a router do when it forwards a packet?
- 6 How does PC find default gateway?
- 7 What does a router look for when it receives a packet?
- 8 How does a network switch know which port a packet comes from?
How does a packet know the destination computer?
Their job is to figure out how to move packets from one network to another. To accomplish this task, routers use forwarding tables to determine where a packet should go. When a packet reaches a router, it will look at the destination address to determine where to send the packet.
How does a router determine where to send an incoming packet?
2.1) A primary function of a router is to determine the best path to use to send packets. To determine the best path, the router searches its routing table for a network address that matches the destination IP address of the packet.
What does the router use to determine whether it should send a packet to a computer associated with it?
The router uses the information in the IP header to decide whether and where to forward each received packet, and which network interface to use to send the packet. Most packets are forwarded based on the packet’s IP destination address, along with routing information held within the router in a routing table.
How does a router identify a computer?
Routers identify devices by their physical address, known as the MAC address (media access control address), which is unique. Based on the MAC address, the DHCP service assigns each device to an IP address, based on the list of free and taken IP addresses range it has.
How does a router forward data packets from one network to another?
A router is a networking device that forwards data packets between computer networks. Routers perform the traffic directing functions on the Internet. Then, using information in its routing table or routing policy, it directs the packet to the next network on its journey.
Are packets sent in order?
TCP guarantees delivery of data and also guarantees that packets will be delivered in the same order in which they were sent. Sequence numbers are used to coordinate which data has been transmitted and received. TCP will arrange for retransmission if it determines that data has been lost.
How do routers determine where a packet needs to go quizlet?
How do routers figure out where a packet needs to go? Routers look at the IP packet header and use the destination address field. An intranet is a private network set up for an organization like a company or university.
How does the router keep track of what replies go where?
When a device connects to a server on the other side of the router, it uses a source port in its ephemeral port range. This is typically a port between 49152 and 65535 and it is randomly assigned. The NAT router records this port number as well as the destination IP address in a NAT translation table.
What does a router do when it forwards a packet?
Packet-forwarding routers forward packets but do not run routing protocols. This type of router receives packets from one of its interfaces that is connected to a single network. These packets are then forwarded through another interface on the router to another local network.
How does the router distinguish between devices?
The difference between a wireless and wired router is what type of connections each device allows. A wired router only has LAN cable ports, while a wireless router (also known as a Wi-Fi router) includes antennae and a wireless adapter that allows devices to connect without a cable.
How does PC find default gateway?
In the Command Prompt window, type “ipconfig” and press “Enter/Return” on your keyboard. You will see a lot of information generated in this window. If you scroll up you should see “Default Gateway” with the device’s IP address listed to the right of it.
How does a router forward a packet?
Similar to switches, routers forward packets from source to destination. However, routers forward packets based on the global routing header (GRH). Each router forwards packets to the next router using subnet information and routing tables. Routing is performed until the packet reaches the destination subnet.
What does a router look for when it receives a packet?
When router receives any packet it has to remove Layer 2 header information present on packet (Example:In Ethernet, source and destination Mac address present on L2 header). Once router remove L2 information it looks for Layer 3 information available on packet that is source and destination IP address.
How does a packet travel through the Internet?
As the packet travels through interconnected ISPs’ routers, backbone infrastructure and so on, it arrives at Machine B’s router, where the opposite process happens – router B sees that its destined for Machine B and sends it inbound. (Similarly, Router B will have to use a process like ARP to find Machine B’s MAC address if not known.)
How does a network switch know which port a packet comes from?
The switch knows which outbound port the MAC address listed as the layer 2 destination is on, because it tracks every MAC address it’s seen a packet come from and which port it came on – if it does not know, then it will flood it out every single port, guaranteeing it’ll arrive. As such, the packet arrives at the router.
How do Netgear routers communicate with each other?
Networking devices communicate with each other with the help of IP address that configures on an individual device. The interface configuration is one of the most important router configurations because, without interfaces, a router does not communicate with other devices on a network.