CCNA Practice Exam 57 — 20 Questions

Question 1

A network engineer is evaluating monitoring technologies for a large enterprise network that requires high-frequency, low-latency traffic data collection with support for custom fields. The solution must also support encryption and authentication to prevent tampering. Which technology best meets these requirements?

Accepted Answer

Implement streaming telemetry using gRPC with TLS and YANG data models.. Streaming telemetry using gRPC with TLS and YANG data models is correct because it provides high-frequency, low-latency push-based data collection, supports custom fields via YANG models, and ensures encryption and authentication through TLS. This meets all the requirements, unlike polling-based or unencrypted alternatives.

Answer

Configure SNMPv2c with community strings and polling every 30 seconds.

Answer

Deploy NetFlow v9 with custom flow records and SNMPv3 for encryption.

Answer

Use IPFIX with UDP export and add authentication via MD5 hashing.

Question 2

You are connected to R1 via the console. R1 is a new router that needs to be configured with a hostname, an encrypted privileged password 'cisco123', and a banner message 'Unauthorized access prohibited'. Additionally, SSH must be enabled for remote management using a domain name 'example.com' and a key size of 1024. The management interface is G0/0 with IP 192.168.1.1/24.

Accepted Answer

hostname R1
enable secret cisco123
banner motd #Unauthorized access prohibited#
ip domain-name example.com
crypto key generate rsa modulus 1024
line vty 0 4
transport input ssh
login local
interface g0/0
ip address 192.168.1.1 255.255.255.0
no shutdown. Configuring hostname, enable secret, and banner sets basic identity and security. Generating RSA keys with a domain name enables SSH; then VTY lines are restricted to SSH only.

Answer

hostname R1
enable password cisco123
banner motd #Unauthorized access prohibited#
ip domain-name example.com
crypto key generate rsa modulus 1024
line vty 0 4
transport input ssh
password cisco123
login
interface g0/0
ip address 192.168.1.1 255.255.255.0
no shutdown

Answer

hostname R1
enable secret cisco123
banner motd #Unauthorized access prohibited#
ip domain-name example.com
crypto key generate rsa modulus 1024
line vty 0 4
transport input ssh
password cisco123
login local
interface g0/0
ip address 192.168.1.1 255.255.255.0
no shutdown

Answer

hostname R1
enable secret cisco123
banner motd #Unauthorized access prohibited#
ip domain-name example.com
crypto key generate rsa modulus 1024
line vty 0 4
transport input ssh
login local
username admin secret cisco123
interface g0/0
ip address 192.168.1.1 255.255.255.0
no shutdown

Question 3

A network engineer is tasked with monitoring a large enterprise network that requires high-frequency, real-time data collection from thousands of routers and switches. The engineer needs a solution that minimizes CPU overhead on the network devices and supports push-based data delivery. Which technology should the engineer choose for this requirement?

Accepted Answer

Streaming telemetry. Streaming telemetry uses a push model where devices continuously send structured data (e.g., via gRPC or UDP) to collectors, reducing the need for polling and lowering CPU impact. SNMPv2c uses pull-based polling (get requests) which increases CPU load with high-frequency queries. NetFlow and IPFIX are flow-based and better suited for traffic analysis, not real-time device metrics like CPU or memory.

Answer

SNMPv2c with frequent polling intervals

Answer

NetFlow

Answer

IPFIX

Question 4

You are connected via the console to R1, a new Cisco ISR 4321 router. The network team requires that all routers be reachable via SSH for management. R1's management interface is GigabitEthernet0/0 with IP 192.168.1.1/24. You need to configure SSH on R1, including a hostname, domain name, RSA key pair of 1024 bits, local user 'admin' with secret 'cisco123', and enable SSH version 2. Additionally, configure the vty lines to accept only SSH connections and use local authentication.

Accepted Answer

R1(config)# hostname R1
R1(config)# ip domain-name example.com
R1(config)# crypto key generate rsa modulus 1024
R1(config)# username admin secret cisco123
R1(config)# ip ssh version 2
R1(config)# line vty 0 4
R1(config-line)# transport input ssh
R1(config-line)# login local. SSH configuration requires a hostname, domain name, RSA key pair, local username, and vty line settings. The command sequence ensures SSH version 2 is used and only SSH connections are accepted on the vty lines.

Answer

R1(config)# hostname R1
R1(config)# ip domain-name example.com
R1(config)# crypto key generate rsa general-keys modulus 1024
R1(config)# username admin password cisco123
R1(config)# ip ssh version 2
R1(config)# line vty 0 4
R1(config-line)# transport input ssh telnet
R1(config-line)# login local

Answer

R1(config)# hostname R1
R1(config)# ip domain-name example.com
R1(config)# crypto key generate rsa modulus 1024
R1(config)# username admin secret cisco123
R1(config)# ip ssh version 2
R1(config)# line vty 0 4
R1(config-line)# transport input all
R1(config-line)# login local

Answer

R1(config)# hostname R1
R1(config)# ip domain-name example.com
R1(config)# crypto key generate rsa modulus 1024
R1(config)# username admin secret cisco123
R1(config)# ip ssh version 2
R1(config)# line vty 0 4
R1(config-line)# transport input ssh
R1(config-line)# password cisco123
R1(config-line)# login

Question 5

A network technician is troubleshooting a connectivity issue where a host cannot communicate with a remote server. The technician notices that frames are being dropped at an intermediate switch. At which OSI model layer does the switch primarily operate, and what is the Protocol Data Unit (PDU) used at that layer?

Accepted Answer

Layer 2; frames. Switches primarily operate at Layer 2 (Data Link layer) of the OSI model, where they make forwarding decisions based on MAC addresses. The Protocol Data Unit (PDU) at this layer is the frame, which includes the MAC header, payload, and trailer. When frames are dropped at an intermediate switch, it indicates a Layer 2 issue such as a MAC address table problem, VLAN mismatch, or duplex mismatch.

Answer

Layer 1; bits

Answer

Layer 3; packets

Answer

Layer 4; segments

Question 6

Which TWO interface error counters indicate a Layer 1 issue?

Accepted Answer

CRC errors. CRC errors occur when the cyclic redundancy check computed at the receiver does not match the value appended by the sender, indicating that the frame was corrupted during transmission. This corruption is typically caused by physical-layer problems such as faulty cabling, bad connectors, or excessive electrical noise. Runts are frames that are smaller than the minimum Ethernet frame size of 64 bytes (excluding preamble), and they often result from collisions or transceiver issues that are Layer 1 phenomena. Both counters directly point to physical-layer impairments rather than logical or congestion-related issues.

Answer

Output queue drops

Answer

Input errors

Answer

Ignored packets

Question 7

Which TWO statements correctly compare 802.11ac and 802.11ax features?

Accepted Answer

802.11ax uses OFDMA, while 802.11ac uses OFDM.. Option A is correct because 802.11ax (Wi‑Fi 6) introduces Orthogonal Frequency Division Multiple Access (OFDMA), which allows multiple users to share subcarriers simultaneously, improving efficiency in dense environments. In contrast, 802.11ac (Wi‑Fi 5) uses Orthogonal Frequency Division Multiplexing (OFDM), where each transmission occupies the entire channel for a single user, leading to less efficient channel utilization. Option C is correct: WPA3 is mandatory for Wi‑Fi 6 (802.11ax) certification, while for 802.11ac it is optional—devices can still obtain Wi‑Fi 5 certification with WPA2 only. Option B is incorrect because 802.11ac supports a maximum of 256‑QAM; 1024‑QAM is first introduced with 802.11ax. Option D is wrong: 802.11ac operates exclusively in the 5 GHz band, but 802.11ax operates in both 2.4 GHz and 5 GHz. Option E is false: both standards support 20, 40, 80, and 160 MHz channel widths; 802.11ac does not exclusively use 80 MHz, and 802.11ax does not use 160 MHz exclusively.

Answer

Both 802.11ac and 802.11ax support 1024-QAM modulation.

Answer

Both standards use only the 5 GHz band.

Answer

802.11ac uses 80 MHz channels, while 802.11ax uses 160 MHz channels exclusively.

Question 8

Which TWO tools or commands are commonly used to troubleshoot wireless client connectivity issues on a Cisco WLAN?

Accepted Answer

ping. The ping command (A) tests basic IP-layer connectivity from the wireless client to a target host, revealing whether the client has a valid IP and can reach the default gateway or servers. The show wireless client summary command (E) is a standard WLC diagnostic command that displays associated clients’ MAC addresses, IP addresses, VLAN assignments, and authentication states, enabling quick identification of connectivity issues at the wireless link layer. Option B, ipconfig /release, only renews the client’s DHCP lease and does not diagnose ongoing connectivity. Option C, traceroute, traces the path to a destination, which is not a primary wireless client troubleshooting tool; it is more suited for routing analysis. Option D, show running-config, displays the device’s static configuration, not live client connectivity. Option F, debug dhcp detail, is a high-impact debug that is too granular for general wireless troubleshooting and can disrupt service.

Answer

ipconfig /release

Answer

traceroute

Answer

show running-config

Answer

debug dhcp detail

Question 9

Which TWO statements correctly describe the configuration and use of a voice VLAN on a Cisco switch port?

Accepted Answer

When a voice VLAN is configured, the switch port operates in two VLANs: one for data and one for voice traffic.. Option B is correct because when a voice VLAN is configured on a Cisco switch port, the port operates in two separate VLANs simultaneously: one for data traffic (the access VLAN) and one for voice traffic (the voice VLAN). This is achieved using the 'switchport voice vlan' command, which allows the switch to tag voice frames with the voice VLAN ID while leaving data frames untagged (or tagged with the access VLAN). This separation ensures that voice traffic receives appropriate QoS treatment and is isolated from data traffic.

Answer

The voice VLAN is configured using the 'switchport mode trunk' command.

Answer

The voice VLAN must be the same as the native VLAN on the trunk link.

Answer

The data VLAN and voice VLAN must be in the same IP subnet.

Question 10

Drag and drop the following steps into the correct order to configure PortFast and BPDU Guard on a Cisco switch interface, then recover after a BPDU violation.

Accepted Answer

Enable PortFast, then enable BPDU Guard, then configure recovery. First enable PortFast to allow immediate transition to forwarding, then enable BPDU Guard to protect against BPDU reception. Recovery steps are configured last to automatically restore the port after a violation.

Answer

Enable BPDU Guard, then enable PortFast, then configure recovery

Answer

Configure recovery, then enable PortFast, then enable BPDU Guard

Answer

Enable PortFast, configure recovery, then enable BPDU Guard

Question 11

Which TWO statements accurately describe the use of packet capture tools for troubleshooting Layer 2/3 issues?

Accepted Answer

A packet capture that shows frames with the same source and destination MAC addresses but different 802.1Q VLAN tags indicates a possible trunk misconfiguration.. Option B is correct because frames with identical source and destination MAC addresses but different 802.1Q VLAN tags indicate the same device is reachable on multiple VLANs, which commonly results from a misconfigured trunk (e.g., native VLAN mismatch or inconsistent allowed VLAN lists). Option D is correct because seeing ICMP echo requests leave a router but no echo replies return suggests the reply is blocked or dropped at some intermediate Layer 3 hop, pointing to a routing problem rather than a Layer 2 issue. Option A is wrong: ARP requests without replies point to a Layer 2 problem (e.g., unreachable destination or filtering), not a Layer 3 routing issue. Option C is wrong: ICMP echo requests without replies could have many causes (ACLs, firewalls, routing) – a switching loop would typically generate excessive broadcasts, not just missing replies. Option E is wrong: TCP SYN without SYN-ACK typically indicates a Layer 4 filtering or unreachable server issue, or possibly a Layer 3 routing problem, not a pure Layer 1 physical fault.

Answer

A packet capture that shows ARP requests with no ARP replies indicates a Layer 3 routing issue.

Answer

A packet capture that shows ICMP echo requests but no echo replies confirms a Layer 2 switching loop.

Answer

A packet capture that shows TCP SYN packets with no SYN-ACK replies indicates a Layer 1 physical issue.

Question 12

You are connected to R1 via console. R1 is a router that has two paths to the Internet: one via ISP1 with next-hop 203.0.113.1, and a backup via ISP2 with next-hop 203.0.113.2. The primary path should be via ISP1, but if it fails, traffic should automatically use ISP2. Currently, R1 has a static default route to ISP1 only. You need to configure a floating static route to ISP2 with an administrative distance of 150 to provide backup connectivity. Additionally, you must ensure that the backup route is only used when the primary route is not available.

Accepted Answer

ip route 0.0.0.0 0.0.0.0 203.0.113.2 150. By setting the administrative distance to 150, the backup static route is less preferred than the primary static route (distance 1). If the primary route is removed due to a failure, the floating route is installed, providing backup connectivity.

Answer

ip route 0.0.0.0 0.0.0.0 203.0.113.2 1

Answer

ip route 0.0.0.0 0.0.0.0 203.0.113.2 250

Answer

ip route 0.0.0.0 0.0.0.0 203.0.113.2

Question 13

Which TWO statements correctly describe the operation of the ip helper-address command in a DHCP relay agent configuration?

Accepted Answer

It forwards DHCPDISCOVER broadcasts from a client to a DHCP server on a different subnet.. Option A is correct because the `ip helper-address` command is configured on the router interface facing the client, and it converts the client's DHCPDISCOVER broadcast into a unicast directed to the specified DHCP server, allowing the client to obtain an IP address from a server on a different subnet. Option D is also correct because the relay agent sets the giaddr (gateway IP address) field in the DHCP packet to its own interface IP address. This is how the DHCP server knows which subnet the client is on and can assign an appropriate IP address and return the reply. Option B is incorrect because the command is configured on the interface facing the DHCP clients, not on the server-facing interface. Option C is incorrect because `ip helper-address` does not forward all UDP broadcasts; it only forwards broadcasts for specific UDP ports (DHCP, DNS, TFTP, etc.) by default, and this list can be modified. Option E is incorrect because the command does not perform any MAC address validation or spoofing protection; it simply relays DHCP messages.

Answer

It is configured on the DHCP server interface to allow replies to reach clients on remote subnets.

Answer

It automatically forwards all UDP broadcasts by default.

Answer

It prevents DHCP spoofing by validating the source MAC address of DHCP packets.

Question 14

You are connected to R1. The connection between R1 and R2 is experiencing intermittent failures. Troubleshoot the interface G0/0 on R1 to identify and resolve the issue so that the link becomes stable and operational.

Accepted Answer

Enter interface configuration mode for G0/0 and issue the 'no loopback' command.. The interface shows '(looped)' in the line status, indicating a layer 1 loop (likely a cable loopback) or a misconfigured loopback test. The interface is physically up and line protocol is up, but the loop condition prevents normal data flow. To fix this, you must remove the loopback test with 'no loopback' on the interface, then verify the interface recovers to 'up, line protocol is up' without the loop indication.

Answer

Enter interface configuration mode for G0/0 and issue the 'no shutdown' command.

Answer

Enter interface configuration mode for G0/0 and issue the 'speed 100' command to force 100 Mbps.

Answer

Enter interface configuration mode for G0/0 and issue the 'no keepalive' command.

Question 15

You are connected to R1 via the console. The link between R1 and R2 is experiencing intermittent connectivity. A 'show interfaces GigabitEthernet0/0' output shows the interface is up/up, line protocol up, Full-duplex, 1000Mb/s, but there are 1234 input errors, including 567 CRC errors. Identify the root cause of the issue, and apply the necessary configuration fix to restore full connectivity.

Accepted Answer

Configure the interface with 'duplex auto' and 'speed auto'.. The output indicates high CRC errors on a GigabitEthernet interface operating at 1000 Mb/s and full-duplex. Since 1000BASE-T does not support half-duplex, a duplex mismatch is not possible. The CRC errors likely result from a speed or duplex negotiation mismatch where one side uses forced settings (e.g., speed 1000 duplex full) and the other uses auto-negotiation, causing physical layer instability. Setting both sides to auto-negotiation ('duplex auto' and 'speed auto') allows them to properly agree on the highest common speed and duplex, resolving the errors. Option A forces full and 1000, which may not match R2 if it is set to auto, so it is not a reliable fix. Option B uses 'duplex half', which is invalid on Gigabit links and would break connectivity. Option C's 'no shutdown' is irrelevant because the interface is already administratively up.

Answer

Configure the interface with 'duplex full' and 'speed 1000'.

Answer

Configure the interface with 'duplex half' and 'speed 100'.

Answer

Configure the interface with 'no shutdown' to re-enable the interface.

Question 16

You are troubleshooting connectivity between R1 and R2. The link is up but users report intermittent packet loss. Examine the provided show interface output on R1, identify the root cause, and apply the necessary fix to restore normal operation.

Accepted Answer

Configure 'duplex auto' and 'speed auto' on interface G0/0 of R1.. The interface shows 'input errors' (150) but zero CRC and zero frame errors. This combination, along with 'Full-duplex, 1000Mb/s' and the link being up/up, indicates the interface is manually set to full-duplex while the connected device (R2) is likely operating at half-duplex (duplex mismatch). Although CRC errors are zero, input errors can still occur due to collisions on a mismatched duplex link. The fix is to set the interface to auto-negotiate duplex and speed, or to manually set both sides to the same duplex setting. The recommended command is 'duplex auto' and 'speed auto' on both ends. In this scenario, we will configure R1's G0/0 for auto-negotiation.

Answer

Replace the faulty cable between R1 and R2.

Answer

Increase the MTU size on interface G0/0 of R1.

Answer

Disable CDP on interface G0/0 of R1.

Question 17

You are connected to R1. The network administrator reports that hosts on VLAN 10 cannot communicate with the server attached to R2's GigabitEthernet0/1 interface. Troubleshoot and resolve the issue. Identify the root cause and apply the necessary fix on R1.

Accepted Answer

Configure 'no duplex' and 'no speed' under interface GigabitEthernet0/0 to enable auto-negotiation.. The issue is a duplex mismatch on GigabitEthernet0/0. R1 is configured with 'duplex full' and 'speed 1000', but the connected switch port is likely set to auto-negotiate or is set to half-duplex. This causes high input errors (1500) and degraded performance. The fix is to set R1's G0/0 to auto-negotiate both speed and duplex, matching the switch's configuration. Enter interface configuration mode for G0/0, issue 'no duplex' and 'no speed' to revert to auto, then clear the interface counters with 'clear counters gigabitethernet0/0'.

Answer

Change the duplex setting on GigabitEthernet0/0 to half-duplex using 'duplex half'.

Answer

Apply 'speed 100' and 'duplex full' on GigabitEthernet0/0 to match a common switch configuration.

Answer

Clear the interface counters on GigabitEthernet0/0 with 'clear counters gigabitethernet0/0' without changing any configuration.

Question 18

You are connected to R1. The network team reports intermittent connectivity between R1 and R2. Examine the following `show interface` output from R1 to identify the root cause of the issue. Then apply the necessary configuration commands on R1 to resolve the problem.

GigabitEthernet0/0 is up, line protocol is up
  Internet address is 10.0.0.1/30
  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 100Mb/s, media type is RJ45
  output flow-control is unsupported, input flow-control is unsupported
  Last input 00:00:01, output 00:00:01, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     100 packets input, 8000 bytes, 0 no buffer
     Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
     100 input errors, 100 CRC, 0 frame, 0 overrun, 0 ignored
     0 output errors, 0 collisions, 0 interface resets
     0 output buffer failures, 0 output buffers swapped out

Accepted Answer

Enter interface configuration mode for the problematic interface and issue the 'no speed' and 'no duplex' commands to revert to auto-negotiation.. The show interface output reveals 100 CRC errors and 100 input errors, indicating a physical layer problem. Additionally, the interface is manually configured for full-duplex and 100 Mb/s. CRC errors often point to a duplex mismatch or faulty cable. Since R1 is set to full-duplex, if R2 is set to auto-negotiation (or half-duplex), a mismatch occurs. The fix is to set both sides to auto-negotiation by removing manual speed and duplex settings. On R1, enter interface configuration mode and issue 'no speed' and 'no duplex' to revert to auto-negotiation, then verify with 'show interfaces' that the interface negotiates to full-duplex and errors stop incrementing.

Answer

Enter interface configuration mode and issue the 'speed 100' and 'duplex full' commands to ensure both sides are set to the same values.

Answer

Enter interface configuration mode and issue the 'no shutdown' command to bring the interface up.

Answer

Enter interface configuration mode and issue the 'duplex half' command to match the remote side's duplex setting.

Question 19

You are connected to R1. Configure IPv4 and IPv6 addressing on R1's interfaces so that R1 can reach R2's loopback0 (192.0.2.1/32) and R2's IPv6 loopback0 (2001:db8:1::1/64). R1 has a misconfigured subnet mask on G0/0 and is missing its default gateway. Additionally, R1 has a duplicate IPv4 address on G0/1 that must be corrected. Use EUI-64 for R1's IPv6 link-local address on G0/0 and static IPv6 for the global unicast address on G0/1.

Accepted Answer

Change G0/0 mask to /30, add default route via 10.0.0.2, change G0/1 IP to 192.0.2.2/30, enable IPv6 on G0/0 with EUI-64 link-local, assign 2001:db8:2::1/64 to G0/1. R1 cannot reach R2 because G0/0 has a wrong subnet mask (/24 instead of /30) and no default gateway. Also, G0/1 has a duplicate IPv4 address (10.0.0.5/30 conflicts with R2's G0/1). To fix: change G0/0 mask to /30, add a default route via 10.0.0.2, assign a unique IP to G0/1 (e.g., 192.0.2.2/30), enable IPv6 on G0/0 with EUI-64 link-local, and assign a static global unicast address to G0/1 (2001:db8:2::1/64).

Answer

Change G0/0 mask to /24, add default route via 10.0.0.1, change G0/1 IP to 10.0.0.6/30, enable IPv6 on G0/0 with EUI-64 link-local, assign 2001:db8:1::1/64 to G0/1

Answer

Change G0/0 mask to /30, add default route via 10.0.0.1, change G0/1 IP to 192.0.2.2/30, enable IPv6 on G0/0 with EUI-64 link-local, assign 2001:db8:2::1/64 to G0/1

Answer

Change G0/0 mask to /30, add default route via 10.0.0.2, change G0/1 IP to 10.0.0.6/30, enable IPv6 on G0/0 with EUI-64 link-local, assign 2001:db8:2::1/64 to G0/1

Question 20

You are connected to R1. Configure IPv4 and IPv6 addressing on R1's GigabitEthernet0/0 and GigabitEthernet0/1 interfaces so that R1 can ping both R2's IPv4 address (203.0.113.2) and R2's IPv6 address (2001:db8:1::2). The current configuration has an incorrect subnet mask on G0/0, missing default gateway, and R1's G0/1 has a duplicate IPv4 address with R3. Also, use EUI-64 for IPv6 on G0/0 and static IPv6 assignment on G0/1. Ensure all issues are resolved and connectivity verified.

Accepted Answer

Change G0/0 subnet mask to 255.255.255.252, add default gateway 203.0.113.2, change G0/1 IPv4 to 192.168.1.254, enable IPv6 routing, configure G0/0 with ipv6 address 2001:db8:1::/64 eui-64, and G0/1 with ipv6 address 2001:db8:2::1/64.. The subnet mask on G0/0 was incorrectly set to /24 instead of /30. While a /24 mask on 203.0.113.1 would include 203.0.113.2 in the same subnet from R1's perspective, the mismatch with R2's /30 mask leads to inconsistent subnet definitions and potential ARP or routing issues. Additionally, no default gateway was configured, so traffic to remote networks would fail. On G0/1, the IPv4 address 192.168.1.1 was already used by R3, causing a duplicate IP conflict. IPv6 was not configured on either interface. The fix involved correcting the subnet mask on G0/0 to 255.255.255.252, adding a default gateway (203.0.113.2), assigning a unique IPv4 address to G0/1 (192.168.1.254), enabling IPv6 routing globally with `ipv6 unicast-routing`, configuring EUI-64 on G0/0 (`ipv6 address 2001:db8:1::/64 eui-64`), and static IPv6 on G0/1 (`ipv6 address 2001:db8:2::1/64`).

Answer

Change G0/0 subnet mask to 255.255.255.0, add default gateway 203.0.113.1, change G0/1 IPv4 to 192.168.1.254, enable IPv6 routing, configure G0/0 with ipv6 address 2001:db8:1::1/64, and G0/1 with ipv6 address 2001:db8:2::1/64.

Answer

Change G0/0 subnet mask to 255.255.255.252, add default gateway 203.0.113.2, change G0/1 IPv4 to 192.168.1.1, enable IPv6 routing, configure G0/0 with ipv6 address 2001:db8:1::/64 eui-64, and G0/1 with ipv6 address 2001:db8:2::1/64.

Answer

Change G0/0 subnet mask to 255.255.255.252, add default gateway 203.0.113.2, change G0/1 IPv4 to 192.168.1.254, enable IPv6 routing, configure G0/0 with ipv6 address 2001:db8:1::1/64, and G0/1 with ipv6 address 2001:db8:2::/64 eui-64.