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How can packet- filtering routers be configured to lower an organizations risk from an external attack?
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Two routers need to be configured within a single ospf area which two components need to be configured on both the routers to achieve this?
Two routers need to be configured within a single OSPF area. Which two components need to be configured on both routers to achieve this?
How are most wireless routers automatically configured?
Most routers can be configured with a web based utility by entering the routers IP address in the browsers address text box.
What is difference between serial interface and Ethernet interface?
The FastEthernet interface of R1 is disabled. One of the default routes is configured incorrectly. A routing protocol is not configured on both routers. The default gateway has not been configured on both routers.
Why do all routers in a stub area need to know that the area is a stub?
So that way all routers in the area know to neither accept, nor generate External (Type 5) LSA's. Additionally, one of the rules of an OSPF area is that all routers in that area must have an identical topology database. If one router is not configured as stub and accepts, or generates an External LSA, then that rule is broken, as the non-stub router will have the external LSA, and the other's will not.
Why do all routers in a stub area need to know that the area is stub?
So that way all routers in the area know to neither accept, nor generate External (Type 5) LSA's. Additionally, one of the rules of an OSPF area is that all routers in that area must have an identical topology database. If one router is not configured as stub and accepts, or generates an External LSA, then that rule is broken, as the non-stub router will have the external LSA, and the other's will not.
Why is a router called a stateless device?
Actually not all routers are stateless devices. There are stateful routers also. The definition depends on the IP filtering and routing algorithms used. Routers which have static IP filters and routing tables are of the stateless type. Routers with Static IP filters allow direct connections from the external network to hosts on the internal network and typically there is no authentication. More intelligent and secure routers with dynamic IP address and packet based filtering are known as stateful type. Stateful routers can also have application proxies or gateways. These have more overheads for processing packets passing through the routers. - Neeraj Sharma
What are sold for home use and are also configured as firewalls and are capable of performing network address translation?
Routers
What is sold for home use and also configured as firewalls and are capable of performing network address translation NAT?
routers
What commands can be used to verify that inter-VLAN communications is functioning?
Using a simple show command will suffice to view that vlan's are configured properly. If the vlan's are configured properly on the routers as well as the switches, then the routers can talk to each other and so can the vlan's.show ip route - Provides a snapshot of the routing table entries.ping - verifies connectivity
Are there any devices on the network that cannot ping each other?
The routers are configured with different versions of RIP. R2 is not forwarding the routing updates.
Can I connect an external Hard Drive to a router?
An external hard drive can only be connected to a router with a USB port. Consider Asus routers for hooking up external drives.
What is the default port used by web servers in routers?
Port 80 is generally configured to be the connecting port for web servers. Home routers aren't generally designed for hosting so port 80 is probably blocked by default but can be forwarded.
