This network was learned through summary LSAs from an ABR.
This network should be used to forward traffic toward external networks.
This network is directly connected to the interface GigabitEthernet0/0.
This network has been learned from an internal router within the same area.
The interface IPv6 link-local address
The all-EIGRP-routers multicast address
The IPv6 global unicast address that is configured on the interface
The 32-bit router ID
The IOS 12 version has commands that are not available in the 15 version.
The IOS version 15 license key is unique to each device, whereas the IOS version 12 license key is not device specific.
Every Cisco ISR G2 platform router includes a universal image in the IOS 12 versions, but not the IOS 15 versions.
IOS version 12.4(20)T1 is a mainline release, whereas IOS version 15.1(1)T1 is a new feature release.
The IOS 12 version has two trains that occur simultaneously, whereas the IOS 15 version still has two trains, but the versions occur in a single sequential order.
access-list 101 permit tcp host 192.168.1.1 eq 80 any
Access-list 101 permit tcp host 192.168.1.1 any eq 80
Access-list 101 permit tcp any host 192.168.1.1 eq 80
Access-list 101 permit tcp any eq 80 host 192.168.1.1
R2 will be elected DR.
R3 will be elected BDR.
The R4 FastEthernet 0/0 priority is 128.
The router ID on R2 is the loopback interface.
R1 will be elected BDR.
The R4 router ID is 172.16.1.1.
Routers create a topology of the network by using information from other routers.
Routers send triggered updates in response to a change.
The database information for each router is obtained from the same source.
Routers send periodic updates only to neighboring routers.
Paths are chosen based on the lowest number of hops to the designated router.
When learned routes age out
Every 30 seconds via broadcast
Every 5 seconds via multicast
Only when necessary
B(config-router)# network 192.168.10.4 0.0.0.3 B(config-router)# network 192.168.10.8 0.0.0.3
B(config-router)# network 192.168.10.4 0.0.0.3 B(config-router)# network 192.168.10.8 0.0.0.3 B(config-router)# network 192.168.10.64 0.0.0.63 B(config-router)# network 192.168.10.128 0.0.0.63 B(config-router)# network 192.168.10.192 0.0.0.63
B(config-router)# network 192.168.10.0 255.255.255.0
B(config-router)# network 192.168.10.4 255.255.255.248 B(config-router)# network 192.168.10.8 255.255.255.248 B(config-router)#network 192.168.10.128 255.255.255.192
B(config-router)# network 192.168.10.0 0.0.0.255
B(config-router)# network 192.168.10.4 0.0.0.3(wirdcard not net mask) B(config-router)# network 192.168.10.8 0.0.0.3 B(config-router)#network 192.168.10.128 0.0.0.63
RAM permanently stores the configuration file used during the boot sequence.
NVRAM stores a backup copy of the IOS used during the boot sequence.
Flash contains boot system commands to identify the location of the IOS.
Flash memory does not lose its contents during a reboot.
ROM contains diagnostics executed on hardware modules.
ROM contains the most current and most complete version of the IOS.
IPv6 uses the link-local address of neighbors as the next-hop address for dynamic routes.
IPv6 routes appear in the same routing table as IPv4 routes.
IPv6 only supports the OSPF and EIGRP routing protocols.
IPv6 routing is enabled by default on Cisco routers.
The features in the Security package are available immediately.
The Evaluation Right-To-Use license for the Security technology package is activated.
The IOS will prompt the user to reboot the router.
The IOS will prompt the user to provide a UDI in order to activate the license.
Static routing typically uses less network bandwidth and fewer CPU operations than dynamic routing does.
Static routing does not advertise over the network, thus providing better security.
The path a static route uses to send data is known.
Static routes scale well as the network grows.
No intervention is required to maintain changing route information.
Configuration of static routes is error-free.
It tells the router which interface to turn on for the OSPF routing process.
It changes the router ID of the router to 192.168.1.1.
It allows all 192.168.1.0 networks to be advertised.
It enables OSPF on all interfaces on the router.
It is identified by the prefix C in the routing table.
It is unaffected by changes in the topology of the network.
It has an administrative distance of 1.
It is automatically updated and maintained by routing protocols.
The autonomous system that is used
Campus backbone architecture
Speed of convergence
It maximizes the number of routes in the routing table.
It improves reachability in discontiguous networks.
It ensures that traffic for multiple subnets uses one path through the internetwork.
It decreases the number of entries in the routing table.
It reduces the frequency of routing updates.
It increases the size of routing updates.
There is one feasible successor to network 192.168.1.8/30.
The neighbor 172.16.6.1 meets the feasibility condition to reach the 192.168.1.0/24 network.
The network 192.168.10.8/30 can be reached through 192.168.11.1.
Router R1 has two successors to the 172.16.3.0/24 network.
The reported distance to network 192.168.1.0/24 is 41024256.
The router selects an image depending on the boot system command in the configuration.
The router selects the third Cisco IOS image because it contains the advipservicesk9 image.
The router selects an image depending on the value of the configuration register.
The router selects the third Cisco IOS image because it is the most recent IOS image.
The router selects the second Cisco IOS image because it is the smallest IOS image.
R1(config)# access-list 5 permit 10.0.70.0 0.0.0.127
R1(config)# interface GigabitEthernet0/0 R1(config-if)# ip access-group 5 out
R1(config)# access-list 5 permit 10.0.54.0 0.0.1.255
R1(config)# access-list 5 permit any
R1(config)# interface Serial0/0/0 R1(config-if)# ip access-group 5 in
IPv6 unicast packets
Router solicitation packets
Neighbor discovery packets
OSPF will run a new DR/BDR election.
A new dead interval timer of 4 times the hello interval will start.
OSPF will remove that neighbor from the router link-state database.
SPF will run and determine which neighbor router is “down”.