Check Your Understanding and Challenge Questions Answers Key in Java Writer barcode 39 in Java Check Your Understanding and Challenge Questions Answers Key

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Appendix: Check Your Understanding and Challenge Questions Answers Key generate, create none none for none projects RFID 4. B. The ip none none helper-address command has been correctly configured on the LAN inter-.

face and is pointing to the IP address of the DHCP server. 5. C. At first glance, A might seem like the correct answer. The DHCPNACK message generated by the debug command does confirm that the host was provided with IP address 10.1.0.

3. However, the show command displays a conflict, which means that the host was unsuccessful, so A is incorrect..

6. C. The ou none for none tput lists port numbers.

This occurs only when NAT Overload is configured. 7. B.

By default, translation entries time out after 24 hours, unless the timers have been. reconfigured with the ip nat translation timeout timeout_seconds command in global configuration mode.. 8. Provides one-to-one fixed mappings of local and global addresses: C Assigns the translated addresses of IP hosts from a pool of public addresses: A Can map multiple addresses to a single address of the external interface: B Assigns unique source port numbers of an inside global address on a session-bysession basis: B Allows an external host to establish sessions with an internal host: C. 9. B. IP address is the inside local address and will be translated into 10. B. NAT will translate the internal addresses to as identified by access list 1. 11. A. IP ad dress 192.

168.14.5 is a private address.

Therefore, static NAT must be config-. ured, becaus none for none e it would enable an outside host to contact the inside global address of web server 1. . 12. D. An FTP server requires a reachable public Internet address to be statically assigned to its internal address. 13. B. The inside local address is being translated into the inside global address 24.74.237.

203.. 14. A and D. RIPng is a distance vector routing protocol with a limit of 15 hops. It uses split horizon and poison reverse updates to prevent routing loops. 15. A and B. Stateless autoconfiguration automatically configures the IPv6 address for the host, and DH none for none CPv6 enables the automatic allocation of reusable network addresses. DHCPv6 is a stateful counterpart to IPv6 stateless autoconfiguration. It can be used separately or concurrently with IPv6 stateless autoconfiguration to obtain configuration parameters.

. Accessing the WAN, CCNA Exploration Companion Guide 16. ipv6 unicast-routing: D ipv6 address: C ip name-server: A ipv6 host name: B ipv6 router rip name: E 17. Answer: none for none B, D, and E. 18.

The four DHCP messages in sequence are as follows:. DHCPDISCOVER message:. A broadcast none for none is forwarded by the host looking for a DHCP server. Messages are forwarded to the DHCP BOOTP server using UDP port 67. DHCPOFFER message:.

When the DHC PDISCOVER message reaches the DHCP server, the server responds with a unicast DHCPOFFER message containing the client s MAC address, offered IP address and mask, default gateway, and the server s IP address. Messages are forwarded to the DHCP BOOTP client using UDP port 68. DHCPREQUEST message:.

Used for two none none purposes: to initially negotiate an IP address lease, and to renegotiate (or renew) the IP address halfway through its lease time. The client broadcasts the DHCPREQUEST message to the DHCP server using UDP port 67. DHCPACK message:.

Is nearly id entical to the original DHCPOFFER but is sent to the client to confirm that it now can use that address using UDP port 68.. 19. Correct none none the following on router R1:. The pool is excluding the entire pool. The command should be ip dhcp excludedaddress 192.168.

11.1 192.168.

11.9. The network pool is allocating the wrong subnet.

The command should be network 192.168.11.

0 255.255.255.

0. The default router IP address is pointing to the switch. The command should be default-router 192.


. Appendix: Check Your Understanding and Challenge Questions Answers Key 20. On router R1, configure the DHCP relay feature on interface Fast Ethernet 0/0 using the following commands: interface FastEthernet 0/0 ip helper-address 21. Static NAT:. Static NAT u none none ses a one-to-one mapping of local and global addresses, and these mappings remain constant. Static NAT is particularly useful for web servers or in general hosts that must have a consistent address that is accessible from the Internet. Dynamic NAT:.

Dynamic NAT uses a pool of public addresses and assigns them on a first-come, firstserved basis. When a host requests access to the Internet, dynamic NAT chooses an IP address from the public pool and temporarily binds it with the internal local address. NAT Overload:.

NAT overload none none ing (sometimes called Port Address Translation or PAT) maps inside local IP addresses to a combination of a global IP address and a unique port number. When a response returns to the NAT router, the router examines the source port number and forwards the packet to the originating inside local address. It also validates that the incoming packets were requested, thus adding a degree of security to the session.


0 and 192.168.11.

0 networks. The host with the inside local IP address 192.168.

10.10 was translated into the overloaded inside global IP address 209.165.

200.225 using the unique port number 16642 when accessing the web server located at 209.165.

200.254. The host with the inside local IP address 192.

168.11.10 was translated into the overloaded inside global IP address 209.

165.200.225 using the unique port number 62452 when accessing the web server located at 209.


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