What does the router do after it determines that a data packet from Network 1 should be forwarded to Network 2?
It reassembles the frame with different MAC addresses than the original frame.
A router would then consult its tables to determine what the next router address should be, and the best route.
--> If the destination network is directly connected, the router forwards the packet to the destination host. --> If no route exists for the destination network and a default route is present, the packet is forwarded to the next-hop router. --> If the originating host has a default gateway configured, the packet for a remote network can be forwarded using that route.
First, routing is the process a router performs when making forwarding decisions for each packet arriving at the gateway interface. To forward a packet to a destination network, the router requires a route to that network. If a route to a destination network does not exist on the router, the packet will be forwarded to the default gateway. Now, the destination network can be a number of routers or hops away from the default gateway… Read More
The TTL (Time To Live) value is a number associated with network routing packets. An information packet will only be forwarded to a certain number of routers before the packet is dropped (deleted). The TTL is a counter decreased by 1 when the packet is forwarded to another router. When the TTL reaches zero, it will not be forwarded to another router.
A wireless router is a device in a wireless local area network (WLAN) that determines the next network point to which a packet should be forwarded toward its destination. A wireless router works in the same way as the router in a hard-wired home or business local area network (LAN), but allows greater mobility for notebook or portable computers. The individual computers are equipped with small wireless transceivers that can be plugged into either a… Read More
A router has to determine if the packet is destined for the same network the router is on, or if it should forward it to another router on another network.
A submask is designed to separate the network id portion of an IP address from the host or client portion. This helps a router determine whether the packet needs to be forwarded to another network.
a router basically seperated networks, so if a packet (in network A) has to reach a different network(network B) it has to reach the Router that connects to the B network.
What does a router execute when it receives a packet from one network that is destined for another network?
If the packet is not destined for the current network the router must consult its routing tables to figure out where to send it next (the next hop).
When the destination network is not listed in the routing table of a cisco router what are two possible options the router might take?
The router discards the packet. The router forwards the packet via the default route
Electronic messages sent between computer networks are stored in the router, while it determines all of the possible paths to the destination address. The router then chooses the most expedient route, based on its investigations into the traffic load, distance, number of network points that the packet has to pass through, and cost algorythms between computer networks, before forwarding the packet to the final destination. Router hardware is a physical device which connects the local… Read More
When the destination network is not listed in the routing table of a Cisco router what are two possible actions that the router might take?
The router discards the packet. The router forwards the packet out the interface indicated by the default route entry.
Direct and Indirect Delivery Forwarded IP packets use at least one of two types of delivery based on whether the IP packet is forwarded to the final destination or whether it is forwarded to an IP router. These two types of delivery are known as direct and indirect delivery. Direct delivery occurs when the IP node (either the sending node or an IP router) forwards a packet to the final destination on a directly attached… Read More
A router is a device that does pretty much what its name would indicate - it "routs" data around a network. To be more specific, a router forwards data packets by performing "traffic direction" functions between two more more separate networks and/or between different computers on the same network When a data packet comes in on one of the lines connected to the router, the router reads the address information in the packet to determine… Read More
A network administrator is using an application that is monitoring packets on the network and sees an EIGRP update packet What is the purpose of the update packet?
bobo The packet is sent to discover neighbors within the EIGRP network. The packet is sent to search for network devices within an EIGRP network. The packet is used to propagate routing information within the EIGRP network. The packet is used to send an unreachable reply to another router within the EIGRP network.
Router A router is similar in a switch in that it forwards packets based on address. But, instead of the MAC address that a switch uses, a router can use the IP address. This allows the network to go across different protocols. The most common home use for routers is to share a broadband internet connection. The router has a public IP address and that address is shared with the network. When data comes through… Read More
Destination Network Address
The router encapsulates the packet in the appropriate data link frame type for the outgoing data link. The router determines the exit interface after data encapsulation.
What is broadcasting and Name a network connection device that relies on it and one that does not rely on it?
Broadcasting is when a packet is sent to all hosts, or all hosts on a subnet. When a broadcast packet is sent through a typical ethernet switch, all port lights will flicker as that packet is forwarded out every port. Other packets are inspected for their intended destination and then forwarded out the correct port. Two very necessary and prevalent protocols, DHCP and ARP, rely on broadcasting. This means a typical ethernet router/gateway device relies… Read More
When the destination network is not listed in the routing table of a Cisco router, what are two possible actions that the router might take?
If a gateway of last resort is configured the router will send the packet based on that route in the routing table, otherwise the packet is dropped.
Time-to-Live (TTL) is a value in an Internet Protocol (IP) packet that tells a network router whether or not the packet has been in the network too long and should be discarded.
destination IP address
Bridge device is similar to a router, but it does not analyze the data being forwarded. Because of this, bridges are typically fast at transferring data, but not as versatile as a router. For example, a bridge cannot be used as a firewall like most routers can. A bridge can transfer data between different protocols (i.e. a Token Ring and Ethernet network). A router on the other hand are like traffic police, they exam each… Read More
A router is a device that decides where to send a data packet in order to get it one step closer to its destination, and then sends it there. In order to make this decision, the router looks at the destination address on the packet and then consults a list of rules programmed into the router by the person who set it up. If there is no explicit rule covering this packet - if the… Read More
The router only needs to know the next-hop address; in other words, it sends the data to the next router; this next router then takes its own decision. Each router maintains a routing table, with information about where to send IP packets. The information is stored on a per-network basis. When the router receives an IP packet, it consults the routing table, to see what is the next-hop address, and through which interface it must… Read More
How important is TTL to network security what is TTL for and can a Hacker use it to harm you PC or network?
TTL stands for "Time To Live". This is a piece of data in a network packet that specifies how many routers the packet can pass through before the packet expires and is thrown away. Every router that the packet travels through subtracts one from the TTL counter. When it reaches zero, the packet expires. The router will drop the packet, and then send a message back to the computer that sent the packet telling it… Read More
If a router has a route in its routing table, it will have a next hop IP address and / or outbound interface. If a router does not have a route in its routing table the packet will be dropped.
A router is used to route data packets between two networks. It reads the information in each packet to tell where it is going. If it is destined for an immediate network it has access to, it will strip the outer packet, readdress the packet to the proper ethernet address, and transmit it on that network.
The subnet mask must match for all NICs in a LAN, otherwise the packets must be forwarded to another network via a router.
The purpose is to avoid the packet from moving around the network indefinitely, in case there are routing problems - especially routing loops.The way it is dealt with is that every router decreases the TTL by one, when forwarding the packet. Once the TTL reaches zero, a router will discard the IP packet.
Destination network address of an incoming packet
No - a router can connect to a computer, another router, a switch, a hub, a bridge or a modem. If you are connecting to the Internet via DSL or cable company you will need a modem/router to connect to them. You then attach your computer (or computers) to that router. Routers are useful because they make decisions about which way a packet of data goes - this network or this network? If you have… Read More
The first purpose of a router is packet switching. It decides the best route for a packet to travel via connection speed, static on the line, and things of that nature. The second purpose of a router is connection to a network, without one you will not be able to connect. Related Terms: LANS WANS MANS SUBNET MASK IP ADDRESS NETWORK ID BROADCAST ID
This is usually handled by a border router with outbound (egress) filtering. It checks the packet for addresses that do not match the network you are in and drops the packet from going out.
in general the router uses the network address to compare to the routing table. Specifically, on the internet, the Router looks up the destination IP address in the router table to determine where to route the packet.
A router is an Intermediate System (IS) which operates at the network layer of the OSI reference model. Routers may be used to connect two or more IP networks, or an IP network to an internet connection. A router consists of a computer with at least two network interface cards supporting the IP protocol. The router receives packets from each interface via a network interface and forwards the received packets to an appropriate output network… Read More
Can a network administrator view the internet history of the clients of a wireless network through the router?
yes, i use a program called wireshark. it's a packet analyzer that tracks every packet sent through a router/hub. you just have to apply the right filters to narrow down the packets. technically this isn't "history", but while this program is running, all packets sent through the network are recorded.
Which operation is used by a router to extract the destination network address from the destination IP address of a packet?
Route table lookup
Which two actions could be taken by a router if a specific match is not made to a route in the routing table?
Neighboring routers are polled to find the best path. The packet will be forwarded to a default route if one is present.
The first router in the path to the destination network. The next hop router is the first (or next) router in the path to the destination network. Each router looks at the destination network in the packet, then consults the routing table to identify the next hop router to the destination network. The hop count identifies the numbers of routers in the path to the destination network. A default gateway router is a router that… Read More
There are a number of reasons for packet loss; bad cabling, bad ports, too many collisions on the network, attenuation in the cable, bad routes, etc.
The basic purose of routing table is that each packet in a network is going to follow the path and indicate that where the packet is going. And that's why every router has a routig table.
You haven't said exactly where the two local connections are located, but usually they would be connected together via a switch or hub and those connections would be forwarded to a router. The router may or may not have a connection to the wide area network but it should have the address of the router that does.
For each router, the following steps occur: 1) The "access-group in" command is checked on the interface, and discards the packet if the rule tells it to do so. 2) The "TTL" field is decreased by 1. 3) If TTL is now 0, the router discards the packet and sends a reply packet back to the sender. 4) The packet's IP address is compared to the routing table to determine the next hop of the… Read More
the following are the functions of a router 1. used for interconnections of networks 2. used for packet filtering 3. used for selections 4. used for setting up a wireless network
It's main task is to handle traffic in a network. It allows multiple computers to communicate amongst each other and with computers outside the local network. A router also determines the shortest path possible for the information to be sent on between two computers.
What types of route allows a router to forward packet even though its routing contain no specific route to the destination network?
A dedicated route
NAT - Network Address Translation NAT is one of the basic fundamental functions of a router. If you want to share your Internet connection with more than one device, you have to use a router (most Internet Service Providers will supply one to you as part of their package). The router acts as your gateway to Internet, taking complete control of your public IP address (the one assigned to you by your ISP) and assigns… Read More
No, because without a default gateway configured the packet will never get to the router, and thus never get to the other network.
The very first device that had fundamentally the same functionality as a router does today, was the Interface Message Processor (IMP); IMPs were the devices that made up the ARPANET, the first packet network.