CCNA Network Infrastructure and Connectivity • Set 20
CCNA Network Infrastructure and Connectivity Practice Test 20 — 15 questions with explanations. Free, no signup.
You are connected to R1 via console. R1 and R2 are directly connected via GigabitEthernet0/0. Your task is to configure IPv4 and IPv6 addressing on both routers so that they can ping each other's IPv4 and IPv6 addresses. The current configuration has intentional faults: R1's IPv4 subnet mask is incorrect, R2 is missing its default gateway, and R1's IPv6 address uses EUI-64 but is not working due to a duplicate IP. Correct the IPv4 mask on R1, assign a static IPv6 address on R2, and ensure both routers can reach each other.
R1#show running-config | section interface GigabitEthernet0/0
interface GigabitEthernet0/0
ip address 192.0.2.1 255.255.255.240
ipv6 address 2001:db8:1::/64 eui-64
no shutdown
R2#show running-config | section interface GigabitEthernet0/0
interface GigabitEthernet0/0
ip address 192.0.2.14 255.255.255.240
no ipv6 address
no shutdown
R2#show ip route
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
a - application route
+ - replicated route, % - next hop override
Gateway of last resort is not set
C 192.0.2.0/28 is directly connected, GigabitEthernet0/0
R1#show ipv6 interface brief
GigabitEthernet0/0 [up/up]
FE80::/10
2001:DB8:1:0:20C:29FF:FE8C:1234
R2#ping 192.0.2.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.0.2.1, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
R1#ping 192.0.2.14
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.0.2.14, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
R2#ping 2001:DB8:1:0:20C:29FF:FE8C:1234
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2001:DB8:1:0:20C:29FF:FE8C:1234, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)R1#show running-config | section interface GigabitEthernet0/0
interface GigabitEthernet0/0
ip address 192.0.2.1 255.255.255.240
ipv6 address 2001:db8:1::/64 eui-64
no shutdown
R2#show running-config | section interface GigabitEthernet0/0
interface GigabitEthernet0/0
ip address 192.0.2.14 255.255.255.240
no ipv6 address
no shutdown
R2#show ip route
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
a - application route
+ - replicated route, % - next hop override
Gateway of last resort is not set
C 192.0.2.0/28 is directly connected, GigabitEthernet0/0
R1#show ipv6 interface brief
GigabitEthernet0/0 [up/up]
FE80::/10
2001:DB8:1:0:20C:29FF:FE8C:1234
R2#ping 192.0.2.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.0.2.1, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
R1#ping 192.0.2.14
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.0.2.14, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
R2#ping 2001:DB8:1:0:20C:29FF:FE8C:1234
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2001:DB8:1:0:20C:29FF:FE8C:1234, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)