- #WHAT IS A CHARACTERISTIC OF AN IPV4 LOOPBACK INTERFACE ON A CISCO IOS ROUTER SERIAL#
- #WHAT IS A CHARACTERISTIC OF AN IPV4 LOOPBACK INTERFACE ON A CISCO IOS ROUTER UPDATE#
- #WHAT IS A CHARACTERISTIC OF AN IPV4 LOOPBACK INTERFACE ON A CISCO IOS ROUTER SOFTWARE#
- #WHAT IS A CHARACTERISTIC OF AN IPV4 LOOPBACK INTERFACE ON A CISCO IOS ROUTER PC#
It is the interface on the next-hop router when the destination IP address is on the 10.1.1.0/24 network.
#WHAT IS A CHARACTERISTIC OF AN IPV4 LOOPBACK INTERFACE ON A CISCO IOS ROUTER UPDATE#
It is the R1 interface through which the EIGRP update was learned. What is the significance of the Serial0/0/0?
#WHAT IS A CHARACTERISTIC OF AN IPV4 LOOPBACK INTERFACE ON A CISCO IOS ROUTER SERIAL#
What additional command must be entered on the serial interface of R1 to bring the interface up?ġ0. When the administrator checks the status of the serial interface, the interface is shown as being administratively down. A network administrator has configured R1 as shown. Which two items are used by a host device when performing an ANDing operation to determine if a destination address is on the same local network? (Choose two.)ĩ. Match the description with the routing table entries.
Only one loopback interface can be enabled on a router.ħ. It is a logical interface internal to the router. It is assigned to a physical port and can be connected to other devices. The no shutdown command is required to place this interface in an UP state. What is a characteristic of an IPv4 loopback interface on a Cisco IOS router? If the destination MAC address that corresponds to the IPv4 address is not in the ARP cache, R1 sends an ARP request.Ħ. R1 uses the destination MAC address of S1. The packet is encapsulated into a PPP frame, and R1 adds the PPP destination address to the frame. R1 leaves the field blank and forwards the data to the PC. What does R1 use as the MAC address of the destination when constructing the frame that will go from R1 to Server B? Open the header and replace the destination MAC address with a new oneĥ. Remove the Ethernet header and configure a new Layer 2 header before sending it out S0/0/0 Nothing, because the router has a route to the destination network Open the header and use it to determine whether the data is to be sent out S0/0/0 If PC1 is sending a packet to PC2 and routing has been configured between the two routers, what will R1 do with the Ethernet frame header attached by PC1?
#WHAT IS A CHARACTERISTIC OF AN IPV4 LOOPBACK INTERFACE ON A CISCO IOS ROUTER PC#
What IPv4 address is used in the destination field in the packet as the packet leaves PC A?Ĥ. When a router receives a packet, it examines the destination address of the packet and looks in the _Routing_ table to determine the best path to use to forward the packet.ģ.
To assign the router to the all-nodes multicast group To permit only unicast packets on the router To prevent the router from joining the all-routers multicast group What is the effect of configuring the ipv6 unicast-routing command on a router? To create a loopback interface, use the following command in a Cisco Router. The command syntax to create a loopback interface is shown below.
Loopback interfaces are treated similar to physical interfaces in a router and we can assign IP addresses to them. By default, router doesn’t have any loopback interfaces (loopback interfaces are not enabled by default), but they can easily be created.
#WHAT IS A CHARACTERISTIC OF AN IPV4 LOOPBACK INTERFACE ON A CISCO IOS ROUTER SOFTWARE#
Loopback interfaces interfaces are always up and running and always available, even if other physical interfaces in the router are down.Ī loop back interface is a software interface which can be used to emulate a physical interface. Loopback interfaces are used as the termination points for Remote Source-Route Bridging (RSRB), and Data-Link Switching Plus (DLSW+). A loopback interface is always up and allows Border Gateway Protocol (BGP) neighborship between two routers to stay up even if one of the outbound physical interface connected between the routers is down. Loopback interface’s IP Address determines a router’s OSPF Router ID. A loopback interface is not a physical interface like Fast Ethernet interface or Gigabit Ethernet interface.Ī loopback interface has many uses.
A loopback interface is a logical, virtual interface in a Cisco Router.