CCNA Chapter 10 and 11

Router R2 is configured with static NAT. Place in order the steps that occur when the client accesses the web server through the router. (Not all options are used.)

Step 1 - The client uses the inside global... Step 2 - R2 receives the packet on its outside interface... Step 3 - R2 replaces the inside global address with the inside local address of the web... Step 4 - The web server uses the outside global address of the client as the dest... Step 5 - R2 receives the packet from the web server. R2 checks the NAT table, then translates the source...

A network administrator wants to examine the active NAT translations on a border router. Which command would perform the task? a. Router# show ip nat translations b. Router# show ip nat statistics c. Router# clear ip nat translations d. Router# debug ip nat translations

a

Refer to the exhibit. A technician is configuring R2 for static NAT to allow the client to access the web server. What is a possible reason that the client PC cannot access the web server? a. Interface S0/0/0 should be identified as the outside NAT interface. b. Interface Fa0/1 should be identified as the outside NAT interface. c. The IP NAT statement is incorrect. d. The configuration is missing a valid access control list.

a

Refer to the exhibit. Router R1 is configured for PAT. What is a possible reason that the addresses in the network are not translated? a. Access-list 1 is misconfigured. b. NAT-POOL2 has not been bound to the ACL. c. Interface Fa0/1 should be identified as the outside NAT interface. d. Interface S0/0/0 should be identified as the inside NAT interface.

a

Which command will allow a network administrator to check the IP address that is assigned to a particular MAC address? a. Router# show ip dhcp binding b. Router# show ip dhcp pool c. Router# show ip dhcp server statistics d. Router# show running-config I section_dhcp

a

Which method is used by a PAT-enabled router to send incoming packets to the correct inside hosts?​ a. It uses the destination TCP or UDP port number on the incoming packet. b. It uses the source TCP or UDP port number on the incoming packet. c. It uses the source IP address on the incoming packet. d. It uses a combination of the source TCP or UDP port number and the destination IP address on the incoming packet.

a

What are two benefits of NAT? (Choose two.) a. It saves public IP addresses. b. It adds a degree of privacy and security to a network. c. It increases routing performance. It makes troubleshooting routing issues easier. d. It makes tunneling with IPsec less complicated.

a, b

What is true regarding the differences between NAT and PAT? a. PAT uses the word "overload" at the end of the access-list statement to share a single registered address. b. Static NAT allows an unregistered address to map to multiple registered addresses. c. Dynamic NAT allows hosts to receive the same global address each time external access is required. d. PAT uses unique source port numbers to distinguish between translations.

d

When a client is requesting an initial address lease from a DHCP server, why is the DHCPREQUEST message sent as a broadcast? a. The client does not yet know the IP address of the DHCP server that sent the offer. b. The DHCP server may be on a different subnet, so the request must be sent as a broadcast. c. The client does not have a MAC address assigned yet, so it cannot send a unicast message at Layer 2. d. The client may have received offers from multiple servers, and the broadcast serves to implicitly decline those other offers.

d

Which message does an IPv4 host use to reply when it receives a DHCPOFFER message from a DHCP server? a. DHCPACK b. DHCPDISCOVER c. DHCPOFFER d. DHCPREQUEST

d

Match the DHCP message types to the order of the stateful DHCPv6 process when a client first connects to an IPv6 network. (Not all options are used.)

Step 1 DDHCPV6 SOLICIT Step 2 DHCPV6 ADVERTISE Step 3 DHCPV6 REQUEST Step 4 DHCPV6 REPLY

Match the DHCP message types to the order of the DHCPv4 process. (Not all options are used.)

Step 1 DHCPDISCOVER Step 2 DHCPOFFER Step 3 DHCPREQUEST Step 4 DHCPACK

A company designs its network so that the PCs in the internal network are assigned IP addresses from DHCP servers, and the packets that are sent to the Internet are translated through a NAT-enabled router. What type of NAT enables the router to populate the translation table from a pool of unique public addresses, as the PCs send packets through the router to the Internet? a. static NAT b. dynamic NAT c. PAT d. ARP

b

How many addresses will be available for dynamic NAT translation when a router is configured with the following commands? Router(config)#ip nat pool TAME 209.165.201.23 209.165.201.30 netmask 255.255.255.224 Router(config)#ip nat inside source list 9 pool TAME a. 7 b. 8 c. 9 d. 10 e. 24 f. 31

b

Refer to the exhibit. A network administrator is configuring a router for DHCPv6 operation. Which conclusion can be drawn based on the commands? a. The DHCPv6 server name is ACAD_CLASS. b. The router is configured for stateless DHCPv6 operation. c. Clients would configure the interface IDs above 0010. d. The router is configured for stateful DHCPv6 operation, but the DHCP pool configuration is incomplete.

b

Refer to the exhibit. PC-A is unable to receive an IPv6 address from the stateful DHCPv6 server. What is the problem? a. The ipv6 dhcp relay command should be applied to interface Gig0/0. b. The ipv6 nd managed-config-flag should be applied to interface Gig0/1. c. The ipv6 nd managed-config-flag command should be ipv6 nd other-config-flag. d. The ipv6 dhcp relay command should use the link-local address of the DHCP server.

b

What is correct in relation to NAT for IPv6? a. It is used to convert private IPv6 addresses to public IPv6 addresses.​ b. It is a temporary mechanism to assist in the migration from IPv4 to IPv6. c. NAT64 has been deprecated by IETF in favor of NAT-PT. d. Dual stack is an example of implementation of NAT for IPv6.

b

Which command should be configured on a router interface to set the router as a stateful DHCPv6 client? a. ipv6 enable b. ipv6 address dhcp c. ipv6 address autoconfigure d. ipv6 dhcp server stateful

b

After booting, a client receives an ICMPv6 RA message with the M flag set to 0 and the O flag set to 1. What does this indicate? a. The client should request an IPv6 address directly from a DHCPv6 server. b. The client should automatically configure an IPv6 address without contacting a DHCPv6 server. c. The client should automatically configure an IPv6 address and then contact a DHCPv6 server for more information. d. The client should be statically configured with an IPv6 address because the local router does not support autoconfiguration.

c

Refer to the exhibit. Which address or addresses represent the inside global address? a. 10.1.1.2 b. 192.168.0.100 c. 209.165.20.25 d. any address in the 10.1.1.0 network

c

What is the most likely scenario in which the WAN interface of a router would be configured as a DHCP client to be assigned a dynamic IP address from an ISP? a. There is a web server for public access on the LAN that is attached to the router. b. The router is also the gateway for a LAN. c. It is a SOHO or home broadband router. d. The router is configured as a DHCP server.

c

What is the purpose of entering the command ip nat inside source static tcp 192.168.10.2 80 209.165.200.223 8080 at the global configuration prompt? a. It identifies the inside NAT interface on the router. b. It prevents the router from establishing a connection with any device that does not have the specified address and port number. c. It binds the inside local address and local port to the specified inside global address and global port. d. It enables a one to one translation between different internal port numbers.

c

When configuring NAT on a Cisco router, what is the inside local IP address? a. the IP address of an inside host as it appears to the outside network b. the IP address of an outside host as it appears to the inside network c. the IP address of an inside host as it appears to the inside network d. the configured IP address assigned to a host in the outside network

c

A network administrator configures the border router with the command R1(config)# ip nat inside source list 4 pool corp. Which ACL is required to be configured in order for this command to function? a. an access list named corp that defines the starting and ending public IP addresses b. an access list named corp that defines the private addresses that are affected by NAT c. an access list that is numbered 4 that defines the starting and ending public IP addresses d. an access list that is numbered 4 that defines the private addresses that are affected by NAT

d

An administrator has configured a DHCPv4 relay router and issued these commands: Router(config)# interface g0/0 Router(config-if)# ip address 10.0.1.1 255.255.255.0 Router(config-if)# no shutdown Router(config-if)# exit Router(config)# ip dhcp pool RELAY Router(dhcp-config)# end The clients are not receiving IP parameters from the DHCPv4 server. What is a possible cause? a. The pool cannot be named 'RELAY'. b. The router is configured as a DHCPv4 client. c. The IP address is incorrect for the subnet mask that is used. d. The ip helper-address command is missing.

d

In which alternative to DHCPv6 does a router dynamically provide IPv6 configuration information to hosts? a. ARP b. EUI-64 c. ICMPv6 d. SLAAC

d

Refer to the exhibit. Router R1 is configured with static NAT. Addressing on the router and the web server are correctly configured, but there is no connectivity between the web server and users on the Internet. What is a possible reason for this lack of connectivity? a. Interface Fa0/0 should be configured with the command ip nat outside. b. The NAT configuration on interface S0/0/1 is incorrect. c. The inside global address is incorrect. d. The router NAT configuration has an incorrect inside local address.

d

An administrator is troubleshooting a DHCPv4 issue on a router. By issuing the debug ip dhcp "_________" command, the administrator can watch, in real time, the IP address assignments that are performed by the router.

server event