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After you configure the Loopback0 interface, Which command can you enter to verify the status of the interface and determine whether fast switching is enabled?

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After you configure the Loopback0 interface, Which command can you enter to verify the status of the interface and determine whether fast switching is enabled?

A. Router#show ip interface loopback 0 
B. Router#show run 
C. Router#show interface loopback 0 
D. Router#show ip interface brief 

Correct Answer: A 
Explanation 
Explanation/Reference: 
Output from real device 
Router2901#sh int g0/0 
GigabitEthernet0/0 is up, line protocol is up 
Hardware is CN Gigabit Ethernet, address is c471.fe99.9999 (bia c471.fe99.9999) 
Description: Lan 
Internet address is 10.1.1.1/25 
MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec, 
reliability 255/255, txload 1/255, rxload 1/255 
Encapsulation ARPA, loopback not set 
Keepalive set (10 sec) 
Full Duplex, 1Gbps, media type is RJ45 
output flow-control is unsupported, input flow-control is unsupported 
ARP type: ARPA, ARP Timeout 04:00:00 
Last input 00:00:00, output 00:00:00, output hang never 
Last clearing of “show interface” counters never 
Input queue: 0/75/61/0 (size/max/drops/flushes); Total output drops: 0 
Queueing strategy: fifo 
Output queue: 0/40 (size/max) 
5 minute input rate 39000 bits/sec, 30 packets/sec 
5 minute output rate 73000 bits/sec, 37 packets/sec 
41068530 packets input, 3905407112 bytes, 0 no buffer 
Received 8678853 broadcasts (0 IP multicasts) 
0 runts, 0 giants, 45 throttles 
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored 
0 watchdog, 79853 multicast, 0 pause input 
39267208 packets output, 2262399504 bytes, 0 underruns 
0 output errors, 0 collisions, 0 interface resets 
79926 unknown protocol drops 
0 babbles, 0 late collision, 0 deferred 
0 lost carrier, 0 no carrier, 0 pause output0 output buffer failures, 0 output buffers swapped out 
Router2901# 
Router2901 ip int g0/0 
GigabitEthernet0/0 is up, line protocol is up 
Internet address is 10.1.1.1/25 
Broadcast address is 255.255.255.255 
Address determined by non-volatile memory 
MTU is 1500 bytes 
Helper address is not set 
Directed broadcast forwarding is disabled 
Secondary address 192.168.1.7/24 
Multicast reserved groups joined: 224.0.0.10 
Outgoing access list is not set 
Inbound access list is not set 
Proxy ARP is enabled 
Local Proxy ARP is disabled 
Security level is default 
Split horizon is enabled 
ICMP redirects are always sent 
ICMP unreachables are always sent 
ICMP mask replies are never sent 
IP fast switching is enabled 
IP fast switching on the same interface is disabled 
IP Flow switching is disabled 
IP CEF switching is enabled 
IP CEF switching turbo vector 
IP multicast fast switching is enabled 
IP multicast distributed fast switching is disabled 
IP route-cache flags are Fast, CEF 
Router Discovery is disabled 
IP output packet accounting is disabled 
IP access violation accounting is disabled 
TCP/IP header compression is disabled 
RTP/IP header compression is disabled 
Policy routing is disabled 
Network address translation is enabled, interface in domain inside 
BGP Policy Mapping is disabled 
Input features: Common Flow Table, Stateful Inspection, Virtual Fragment Reassembly, Virtual Fragment 
Reassembly After IPSec Decryption, CAR, MCI Check 
Output features: NAT Inside, Common Flow Table, Stateful Inspection, NAT ALG proxy, CAR 
Post encapsulation features: CAR 
IPv4 WCCP Redirect outbound is disabled 
IPv4 WCCP Redirect inbound is disabled 
IPv4 WCCP Redirect exclude is disabled 
Router2901#

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verify the status of the interface

After you configure the Loopback0 interface, Which command can you enter to verify the status of the interface and determine whether fast switching is enabled?
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