In conjunction with an ra, what can an ipv6 network host use to self-assign its ip address?

Which DHCPv4 message will a client send to accept an IPv4 address that is offered by a DHCP server?

• unicast DHCPACK
• broadcast DHCPACK
• unicast DHCPREQUEST
• broadcast DHCPREQUEST*

A company uses DHCP servers to dynamically assign IPv4 addresses to employee workstations. The address lease duration is set as 5 days. An employee returns to the office after an absence of one week. When the employee boots the workstation, it sends a message to obtain an IP address. Which Layer 2 and Layer 3 destination addresses will the message contain?

• FF-FF-FF-FF-FF-FF and 255.255.255.255*
• both MAC and IPv4 addresses of the DHCP server
• MAC address of the DHCP server and 255.255.255.255
• FF-FF-FF-FF-FF-FF and IPv4 address of the DHCP server

Which is a DHCPv4 address allocation method that assigns IPv4 addresses for a limited lease period?

• manual allocation
• pre-allocation
• automatic allocation
• dynamic allocation*

Which address does a DHCPv4 server target when sending a DHCPOFFER message to a client that makes an address request?

• client IP address
• client hardware address*
• gateway IP address
• broadcast MAC address

As a DHCPv4 client lease is about to expire, what is the message that the client sends the DHCP server?

• DHCPDISCOVER
• DHCPOFFER
• DHCPREQUEST*
• DHCPACK

What is an advantage of configuring a Cisco router as a relay agent?

• It will allow DHCPDISCOVER messages to pass without alteration.
• It can forward both broadcast and multicast messages on behalf of clients.
• It can provide relay services for multiple UDP services.*
• It reduces the response time from a DHCP server.

An administrator issues the commands:Router(config)# interface g0/1Router(config-if)# ip address dhcpWhat is the administrator trying to achieve?

• configuring the router to act as a DHCPv4 server
• configuring the router to obtain IP parameters from a DHCPv4 server*
• configuring the router to act as a relay agent
• configuring the router to resolve IP address conflicts

Under which two circumstances would a router usually be configured as a DHCPv4 client? (Choose two.) The router is intended to be used as a SOHO gateway.* The administrator needs the router to act as a relay agent. The router is meant to provide IP addresses to the hosts. This is an ISP requirement.* The router has a fixed IP address.

• The router is intended to be used as SOHO gateway.*
• The administrator need the router to act relay agent.
• The router is meant to provide IP addresses to hosts.
• This is an ISP requirement.*
• The router has a fixed IP address.

A company uses the SLAAC method to configure IPv6 addresses for the employee workstations. Which address will a client use as its default gateway?

• the all-routers multicast address
• the link-local address of the router interface that is attached to the network*
• the unique local address of the router interface that is attached to the network
• the global unicast address of the router interface that is attached to the network

A network administrator configures a router to send RA messages with M flag as 0 and O flag as Which statement describes the effect of this configuration when a PC tries to configure its IPv6 address?

• It should contact a DHCPv6 server for all the information that it needs.
• It should use the information that is contained in the RA message exclusively.
• It should use the information that is contained in the RA message and contact a DHCPv6 server for additional information*
• It should contact a DHCPv6 server for the prefix, the prefix-length information, and an interface ID that is both random and unique.

A company implements the stateless DHCPv6 method for configuring IPv6 addresses on employee workstations. After a workstation receives messages from multiple DHCPv6 servers to indicate their availability for DHCPv6 service, which message does it send to a server for configuration information?

DHCPv6 SOLICIT DHCPv6 REQUEST DHCPv6 ADVERTISE DHCPv6 INFORMATION-REQUEST*

An administrator wants to configure hosts to automatically assign IPv6 addresses to themselves by the use of Router Advertisement messages, but also to obtain the DNS server address from a DHCPv6 server. Which address assignment method should be configured?

• SLAAC
• stateless DHCPv6 *
• stateful DHCPv6
• RA and EUI-64

How does an IPv6 client ensure that it has a unique address after it configures its IPv6 address using the SLAAC allocation method?

• It sends an ARP message with the IPv6 address as the destination IPv6 address.
• It checks with the IPv6 address database that is hosted by the SLAAC server.
• It contacts the DHCPv6 server via a special formed ICMPv6 message.
• It sends an ICMPv6 Neighbor Solicitation message with the IPv6 address as the target IPv6 address.*

What is used in the EUI-64 process to create an IPv6 interface ID on an IPv6 enabled interface?

• the MAC address of the IPv6 enabled interface*
• a randomly generated 64-bit hexadecimal address
• an IPv6 address that is provided by a DHCPv6 server
• an IPv4 address that is configured on the interface

What two methods can be used to generate an interface ID by an IPv6 host that is using SLAAC? (Choose two.)

• EUI-64
• random generation
• stateful DHCPv6
• DAD
• ARP

• EUI-64
• random generation
• stateful DHCPv6
• DAD
• ARP

Refer to the exhibit. Based on the output that is shown, what kind of IPv6 addressing is being configured?

• SLAAC
• stateful DHCPv6
• stateless DHCPv6*
• static link-local

What is the result of a network technician issuing the command ip dhcp excluded-address 10.0.15.1 10.0.15.15 on a Cisco router?

• The Cisco router will exclude only the 10.0.15.1 and 10.0.15.15 IP addresses being leased to DHCP clients.
• The Cisco router will allow only the specified IP addresses to be leased to clients.
• The Cisco router will exclude 15 IP addresses from being leased to DHCP clients.*
• The ip dhcp excluded-address command is followed by the first and the last addresses to be excluded from being leased to DHCP clients.

Refer to the exhibit. What should be done to allow PC-A to receive an IPv6 address from the DHCPv6 server?

• Add the ipv6 dhcp relay command interface Fa0/0.*
• Configure the ipv6 nd managed-config-flag command on interface Fa0/1.
• Change the ipv6 nd managed-config-flag command to ipv6 nd other-config-flag.
• Add the IPv6 address 2001:DB8:1234:5678::10/64 to the interface configuration of the DHCPv6 server.

Refer to the exhibit. A network administrator is implementing stateful DHCPv6 operation for the company. However, the clients are not using the prefix and prefix-length information that is configured in the DHCP pool. The administrator issues a show ipv6 interface command. What could be the cause of the problem?

• No virtual link-local address is configured
• The Duplicate Address Detection feature is disabled
• The router is configured for SLAAC DHCPv6 operation
• The router is configured for stateless DHCPv6 operation*

Refer to the exhibit. A network administrator is implementing the stateless DHCPv6 operation for the company. Clients are configuring IPv6 addresses as expected. However, the clients are not getting the DNS server address and the domain name information configured in the DHCP pool. What could be the cause of the problem?

• The GigabitEthernet interface is not activated
• The router is configured for SLAAC operation*
• The DNS server address is not on the same network as the clients are on
• The clients cannot communicate with the DHCPv6 server, evidenced by the number of active clients being 0

Fill in the blank. Do not abbreviateType a command to exclude the first fifteen useable IP addresses from a DHCPv4 address pool of the network 10.0.15.0/24.
Router(config)# ip dhcp ________________

excluded-address 10.0.15.1 10.0.15.15

Order the steps of configuring a router as a DHCPv4 Server. (Not all options are used.)

• Step 1 = Exclude IP addresses
• Step 2 = Configure a DHCP pool
• Step 3 = Define the default gateway router

Match the description to the corresponding DHCPv6 server type. (Not all options are used.)

Stateless

= enabled in RA messages...

= clients send only DHCPv6...

= enables on the client with the ipv6 address autoconfig command

= the M flag...

= use the address command...

= enabled on the client with the ipv6 address dhcp command

What is the primary purpose of NAT?

• conserve IPv4 addresses*
• allow peer-to-peer file sharing
• enhance network performance
• increase network security

Which method is used by a PAT-enabled router to send incoming packets to the correct inside hosts?​

• It uses the destination TCP or UDP port number on the incoming packet. *
• It uses the source TCP or UDP port number on the incoming packet.
• It uses the source IP address on incoming packet.
• It uses a combination of the source TCP or UDP port number and the destination IP address on the incoming packet.

What are two benefits of NAT? (Choose two.)

• It makes troubleshooting routing issues easier.
• It makes tunneling with IPsec less complicated.
• It saves public IP addresses.
• It increases routing performance.
• It adds a degree of privacy and security to a network.

• It makes troubleshootng routing issues easier.
• It makes tunneling with IPsec less complicated.
• It saves public IP addresses. *
• It increases routing performance.
• It adds a degree of privacy and security to a network.

What is a disadvantage of NAT?

• There is no end-to-end addressing.*
• The router does not need to alter the checksum of the IPv4 packets.​
• The costs of readdressing hosts can be significant for a publicly addressed network.​
• The internal hosts have to use a single public IPv4 address for external communication.

What is an advantage of deploying IPv4 NAT technology for internal hosts in an organization?

• increases the performance of packet transmission to the Internet
• makes internal network access easy for outside hosts using UDP
• provides flexibility in designing the IPv4 addressing scheme *
• enables the easy deployment of applications that require end-to-end traceability

Refer to the exhibit. Which address or addresses represent the inside global address?

• 192.168.0.100
• 10.1.1.2
• any address in the 10.1.1.0 network
• 209.165.20.25 *                                     

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?

• The IP NAT statement is incorrect.
• Interface Fa0/1 should be identified as the outside NAT interface.
• Interface S0/0/0 should be identified as the outside NAT interface. *
• The configuration is missing valid access control list.

A network administrator configures the border router with the command R1(config)# ip nat inside source list 4 pool corp. What is required to be configured in order for this particular command to be functional?

• a NAT pool named corp that defines the starting and ending public IP addresses *
• an access list numbered 4 that defines the starting and ending public IP addresses
• ip nat outside to be enabled on the interface that connects to the LAN affected by the NAT
• an access list named corp that defines the private addresses that are affected by NAT
• a VLAN named corp to be enabled and active and routed by R1

When dynamic NAT without overloading is being used, what happens if seven users attempt to access a public server on the Internet when only six addresses are available in the NAT pool?

• No users can access the server.
• The request to the server for the seventh user fails. *
• All users can access the server.
• The first user gets disconnected when the seventh user makes the request.

What is defined by the ip nat pool command when configuring dynamic NAT?

• the range of external IP addresses that internal hosts are permitted to access
• the pool of available NAT servers
• the range of internal IP addresses that are translated
• the pool of global address *

Refer to the exhibit. What is the purpose of the command marked with an arrow shown in the partial configuration output of a Cisco broadband router?

• defines which addresses are allowed into the router
• defines which addresses can be translated *
• defines which addresses are assigned to a NAT pool
• defines which addresses are allowed out the router

A network engineer has configured a router with the command ip nat inside source list 4 pool corp overload. Why did the engineer use the overload option?

• The company router must throttle or buffer traffic because the processing power of the router is not enough to handle the normal load of external-bound Internet traffic.
• The company has more private IP addresses than available public IP addresses. *
• The company needs to have more public IP addresses available to be used on the Internet.
• The company has a small number of servers that should be accessible by clients from the Internet.

What are two required steps to configure PAT? (Choose two.)

• Create a standard access list to define applications that should be translated.
• Define a pool of global addresses to be used for overload translation.
• Define the range of source ports to be used.
• Identify the inside interface.

• Create a standard access list to define applications that should be translated.
• Define a pool of global addresses to be used for overload translation. *
• Define the range of source ports to be used.
• Identify the inside interface. *

What is the major benefit of using NAT with Port Address Translation?

• It allows external hosts access to internal servers.
• It allows many internal hosts to share the same public IPv4 address. *
• It improves network performance for real-time protocols.
• It provides a pool of public addresses that can be assigned to internal hosts.

What is the purpose of port forwarding?

• Port forwarding allows an internal user to reach a service on a public IPv4 address that is located outside a LAN.
• Port forwarding allows users to reach servers on the Internet that are not using standard port numbers.
• Port forwarding allows for translating inside local IP addresses to outside local addresses.
• Port forwarding allows an external user to reach a service on a private IPv4 address that is located inside a LAN. *

A network administrator is configuring a static NAT on the border router for a web server located in the DMZ network. The web server is configured to listen on TCP port 8080. The web server is paired with the internal IP address of 192.168.5.25 and the external IP address of 209.165.200.230. For easy access by hosts on the Internet, external users do not need to specify the port when visiting the web server. Which command will configure the static NAT?

• R1(config)# ip nat inside source static tcp 209.165.200.230 80 192.168.5.25 8080
• R1(config)# ip nat inside source static tcp 192.168.5.25 8080 209.165.200.230 80 *
• R1(config)# ip nat inside source static tcp 209.165.200.230 8080 192.168.5.25 80
• R1(config)# ip nat inside source static tcp 192.168.5.25 80 209.165.200.230 8080

What is a characteristic of unique local addresses?

• They are defined in RFC 3927.
• Their implementation depends on ISPs providing the service.
• They allow sites to be combined without creating any address conflicts. *
• They are designed to improve the security of IPv6 networks.

Which statement describes IPv6 ULAs?

• They begin with the fe80::/10 prefix.
• They conserve IPv6 address space.
• They are not routable across the Internet*
• They are assigned by an ISP.

Refer to the exhibit. Based on the output that is shown, what type of NAT has been implemented?

• PAT using an external interface *
• static NAT with one entry
• dynamic NAT with a pool of two public IP addresses
• static NAT with a NAT pool

Match the steps with the actions that are involved when an internal host with IP address 192.168.10.10 attempts to send a packet to an external server at the IP address 209.165.200.254 across a router R1 that is running dynamic NAT. (Not all options are used.)

Step 1

= the host sends...

= R1 checks...

= If there is no...

= R1 selects...

= R1 replaces...

Fill in the blank. Do not use abbreviations. NAT overload is also known as _____

Port Address Translation (PAT)

A technician is required to configure an edge router to use a different TCP port number for each session with a server on the Internet. What type of Network Address Translation (NAT) should be implemented?

• a many-to-one address mapping between local and global addresses*
• a many-to-many address mapping between local and global addresses
• a one-to-many address mapping between local and global addresses
• a one-to-one address mapping between local and global addresses

Beginning with the Cisco IOS Software Release 15.0, which license is a prerequisite for installing additional technology pack licenses?

• IPBase*
• UC
• DATA
• SEC

What is the major release number in the IOS image name c1900-universalk9-mz.SPA.152-3.T.bin?

• 15*
• 52
• 2
• 1900
• 3

Refer to the exhibit. What does the number 17:46:26.143 represent?

• the time passed since syslog srver has been started
• the time on the router when the show logging command was issued
• the time passed since the interfaces have been up
• the time when the syslog message was issued*

What statement describes a Cisco IOS image with the “universalk9_npe” designation for Cisco ISR G2 routers?

• It is an IOS version that provides only the IPBase feature set
• It is an IOS version that, at the request of some countries removes any strong cryptographic functionality*
• It Is an IOS version that offers all of the Cisco IOS Software feature sets
• It is an IOS version that can only be used in the United States o

Refer to the exhibit. Routers R1 and R2 are connected via a serial link. One router is configured as the NTP master, and the other is an NTP client. Which two pieces of information can be obtained from the partial output of the show ntp associations detail command on R2? (Choose two.)

• Both routers are configured to use NTPv2.
• Router R1 is the master, and R2 is the client*
• The IP address of R2 is 192 168.1.2.
• Router R2 is master, and R1 is client
• The IP address of R1 is 192.168.1.2*

A network administrator configures a router with the command sequence: R1(config)# boot system tftp://c1900-universalk9-mz.SPA.152-4.M3.bin R1(config)# boot system rom What is the effect of the command sequence?

• The router will copy the IOS image from the TFTP server and then reboot the system.
• The router will search and load a valid IOS image In the sequence of flash, TFTP, and ROM.
• On next reboot the router will load the IOS image from ROM.
• The router will load IOS from the TFTP server. If the image fail to load. It will load IOS image from ROM.*

What is used as the default event logging destination for Cisco routers and switches?

• terminal line
• workstation
• syslog server
• console line*

When a customer purchases a Cisco IOS 15.0 software package, what serves as the receipt for that customer and is used to obtain the license as well?

• Software Claim Certificate
• End User License Agreement
• Product Activation Key*
• Unique Device Identifier

Refer to the exhibit. Which two conclusions can be drawn from the syslog message that was generated by the router? (Choose two.)

• This message resulted from an unusual error requihng reconfiguration of the interface
• This message indicates that service timestamps have been configured*
• This message indicates that the interface changed state five times
• This message is a level 5 notification message*

What code in the Cisco IOS 15 image filename c1900-universalk9-mz.SPA.153-3.M.bin indicates that the file is digitally signed by Cisco?

• mz
• SPA*
• universalk9
• M

In addition to IPBase, what are the three technology packs that are shipped within the universal Cisco IOS Software Release 15 image? (Choose three.)

• SP Services
• Security*
• Advanced IP Services
• DATA*
• Unified Communications*
• Advanced Enterprise Services

Which three software packages are available for Cisco IOS Release 15.0?

• IPVbice
• Unified Communications*
• DATA*
• Enterprise Services
• Advanced IP Services
• Security*

A network engineer is upgrading the Cisco IOS image on a 2900 series ISR. What command could the engineer use to verify the total amount of flash memory as well as how much flash memory is currently available?

• show flashO:*
• show startup-config
• show version
• show interlaces

A ping fails when performed from router R1 to directly connected router R2. The network administrator then proceeds to issue the show cdp neighbors command. Why would the network administrator issue this command if the ping failed between the two routers?

• The network administrator wants to venfy the IP address configured on router R2.
• The network administrator suspects a virus because the ping command did not work.
• The network administrator wants to verify Layer 2 connectivity.*
• The network administrator wants to determine if connectivity can be established from a non-directly connected network.

Refer to the exhibit. From what location have the syslog messages been retrieved?

• syslog server
• syslog client
• router RAM*
• router NVRAM

Which command is used to configure a one-time acceptance of the EULA for all Cisco IOS software packages and features?

• license save
• license accept end user agreement*
• show license
• license boot module module-name
• Next

Which command would a network engineer use to find the unique device identifier of a Cisco router?

• show running-configuration
• license instal stored-loction-uri
• show license udi*
• show version

Which syslog message type is accessible only to an administrator and only via the Cisco CLI?

• errors
• alerts
• debugging*
• emergency

Refer to the exhibit. Match the components of the IOS image name to their description. (Not all options are used.)

The command ntp server 10.1.1.1 is issued on a router. What impact does this command have?

• determines which server to send system log files to
• synchronizes the system clock with the time source with IP address 10.1 1 1*
• ensures that all logging will have a time stamp associated with it
• identifies the server on which to store backup configurations

Which two statements are true about NTP servers in an enterprise network? (Choose two.)

• NTP servers ensure an accurate time stamp on logging and debugging information*
• NTP servers control the mean urne between failures (MTBF) for key network devices
• NTP servers at stratum 1 are directly connected to an authoritative time source*
• All NTP servers synchronize directly to a stratum 1 time source

A network administrator has issued the logging trap 4 global configuration mode command. What is the result of this command?

• After four events the syslog client will send an event message to the syslog server.
• The syslog client will send to the syslog server any event mesage that has seventy level of 4 and higher.
• The syslog client will send to the syslog server event messages with an identification trap level of only 4.
• The syslog client will send to the syslog server any event message that seventy level of 4 and lower*

Which statement is true about CDP on a Cisco device?​

• The show cdp neighbor detail command will reveal the IP address of a neighbor only if there is Layer 3 connectivity
• To disable CDP globally, the no cdp enable command in interface configuration mode must be used
• CDP can be disabled globally or on a specific interface*
• Because it runs at the data link layer, the CDP protocol can only be implemented in switches

Why would a network administrator issue the show cdp neigbors command on a router?

• to display router ID and other information about OSPF neighbors.
• to display routing table and other information about directly connected Cisco devices.
• to display line status and other information about directly connected Cisco devices.
• to display device ID and other information about directly connected Cisco devices.*

Which protocol or service allows network administrators to receive system messages that are provided by network devices?

• SNMP
• NetFlow
• NTP
• Next
• syslog*

Which two conditions should the network administrator verify before attempting to upgrade a Cisco IOS image using a TFTP server? (Choose two.)

• Verify that the TFTP server is running using the tftpdnld command
• Verify that there is enough flash memory for the new Cisco IOS image using the show flash command*
• Verify the name of the TFTP server using the show hosts command
• Verify connectivity between the router and TFTP server using the ping command*

What can IPv6 networks use to assign IP addresses?

How are IPv6 addresses assigned?

What are the 3 options for a host to configure an IPv6 address?

How do I assign an IPv6 address to my computer?