CIT 116 Modules 7,8,and 9

The new forwarding router assumes both the IP and MAC addresses of the virtual router

STEP4

Which FHRP implementation is a nonproprietary IPv4-only election protocol which has one master router per group?

VRRPv2

Which FHRP implementation is a nonproprietary IPv4-only election protocol with limited scalability?

VRRPv2

DHCPv6 SOLOCIT

STEP 1

DHCPv6 ADVERTISE

STEP 2

DHCPv6 REQUEST

STEP 3

DHCPv6 REPLY

STEP 4

The forwarding router fails

STEP1

The standby router stops seeing hello messages from the forwarding router.

STEP2

The standby router assumes the role of the forward router

STEP3

Which FHRP implementation is a Cisco proprietary protocol that supports IPv6 load balancing?

GLBP for IPv6

A Cisco proprietary FHRP that provides redundancy through use of an active device and standby device.

HSRP

The address pool of a DHCP server is configured with 172.18.93.0/25/ The network administrator reserves 10 IP addresses for web servers. How many IP addresses are left in the pool to be assigned to other hosts?

116

A Message that is used to acknowledge that the lease is successful

DHCPACK

The address pool of a DHCP server is configured with 10.92.71.0/25. The network administrator reserves 8IP addresses for servers. How many IP addresses are left in the pool to be assigned to other hosts?

118

Which protocol automates assignment of IP address on a network, and which port number does it use?

1. DHCP 2. 67

A DHCP-enabled client PC has just booted. During which two steps will the client PC use broadcast messages when communicating with a DHCP server? (Choose two.)

1. DHCPDISCOVER 2. DHCPREQUEST

The address pool of a DHCP server is configured with 10.19.44.0/24. The network administrator reserves 3 IP addresses for servers. How many IP addresses are left in the pool to be assigned to other hosts?

251

The address pool of a DHCP server is configured with 10.3.2.0/24. The network administrator reserves 3 IP addresses for printers. How many IP addresses are left in the pool to be assigned to other hosts?

251

The address pool of a DHCP server is configured with 192.168.184.0/26. The network administrator reserves 18 IP addresses for access points. How many IP addresses are left in the pool to be assigned to other hosts?

44

The address of a DHCP server is configured with 172.23.143.0/26. The network administrator reserves 14 IP addresses for file servers. How many IP addresses are left in the pool to be assigned to other hosts?

48

A company uses DHCP to manage IP address deployment for employee workstations. The IT department deploys multiple DHCP servers in the data center and uses DHCP relay agents to facilitate the DHCP requests from workstations. Which two UDP port are used to forward DHCP traffic?

67 and 68

The address pool of a DHCP server is configured with 192.168.234.0/27. The network administrator reserves 22 IP addresses for IP phones. How many IP addresses are left in the pool to be assigned to other hosts?

8

What is the administrators trying to achieve?

Configuring the router to obtain IP parameters from a DHCPv4 server

A host PC is attempting to lease an address through DHCP. What message is sent by the server to let the client know it is able to use the provided IP information.

DHCPACK

The DHCP server confirming that the address lease has been accepted

DHCPACK

A client initiating a message to find a DHCP server

DHCPDISCOVER

A message that is used to locate any available DHCP server on a network

DHCPDISCOVER

Which DHCP IPv4 message contains the following information? Destination address:255.255.255.255 Client IPv4 address:0.0.0.0 Default gateway address: 0.0.0.0 Subnet mask:0.0.0.0

DHCPDISCOVER

A DHCP server responding to the initial request by a client

DHCPOFFER

A message that is used to suggest a lease to a client

DHCPOFFER

A message that is used to identify the explicit server and lease offer to accept

DHCPREQUEST

The client accepting the IP address provided by the DHCP server.

DHCPREQUEST

Which message does an IPv4 host use to reply when it receives a DHCPOFFER message from a DHCP server?

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 address will the message contain?

FF-FF-FF-FF-FF-FF and 255.255.255.255

A Cisco propritary FHRP that provides load sharing in addition to redundancy.

GLBP

Which FHRP implementation is a Cisco-proprietary protocol that supports IPv4 load sharing?

GLBP

Which FHRP implementation is Cisco-proprietary and permits only one router in a group to forward IPv6 packets?

HSRP for IPv6

A network administrator is analyzing the features that are supported by different first-hop router redundancy protocols. Which statement describes a feature that is associated with HSRP?

HSRP uses active and standby router.

Which FHRP implementation is a nonproprietary protocol which relies on ICMP to provide IPv4 redundancy?

IRDP

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

It can provide relay services for multiple UDP services.

Which statement described HSRP?

It is used a within a group of routers for selecting an active device and a standby device to provide gateway service to a LAN.

A network administrator configures a router to send RA messages with M flag as 0 and 0 flag as 1. Which statement describes the effect of this configuration when a PC tries to configure its IPv6 address?

It should use the information that is contained in the RA message and contact a DHCPv6 server for additional information.

Which command will allow a network administrator to check the IP address that is assigned to a particular MAC address?

Router#show ip dhcp binding

An administrator issues the commands:

Router(Config) interface g0/1 Router (config-if)# ip address dhcp

A client device on an Ethernet segment needs an IP address in order to communicate on the network. A DHCP server with IP address 192.168.1.1 has been configured and enabled on the network. How will a client device obtain a usable IP address for this network?

Send a DHCPDISCOVER message to physical address FF-FF-FF-FF-FF-FF

A small coffee shop is offering free Wi-Fi to customers. The network includes a wireless router and a DSL modem that is connected to the local phone company. What method is typically used to configure the connection to the phone company?

Set the WAN connection in the wireless router as a DHCP client.

The forward router fails

Step 1

The standby router stops seeing hello messages from the forwarding router.

Step 2

The standby router initiates an ARP request

Step 3

DHCPACK

Step 4

The new forwarding router assumes both the IP and MAC addresses of the virtual router.

Step 4

DHCPDISCOVER

Step1

DHCPOFFER

Step2

DHCPREQUEST

Step3

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

The Cisco router exclude 15 IP addresses from being leased to DHCP clients.

When a client is requesting an initial address lease from a DHCP server, Why is the DHCPREQUEST message sent as a broadcast?

The client may have received offers from multiple servers, and the broadcast serves to implicitly decline those other offers.

What is one indication that a Windows computer did not receive an IPv4 address from a DHCP server?

The computer receives an IP address that starts with 169.254

After a host has generated an IPv6 address by using the DHCPv6 or SLAAC process, how does the host verify that the address is unique and therefore usable?

The host sends an ICMPv6 neighbor solicitation message to the DHCP or SLAAC-learned address and if no neighbor advertisement is returned, the address is considered unique.

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 link-local address of the router interface that is attached to the network.

An open standard FHRP that provide redundancy through use of a virtual routers master and one or more backup

VRRP

Which statement is true about DHCP operation?

When a device that is configured to use DHCP boots, the client broadcasts a DHCPDISCOVER message to identify any available DHCP servers on the network.

What is a result when the DHCP servers are not operational in a network?

Workstation are assigned with IP addresses in the 169.254.0.0/16 network

Which kind of of message is sent by a DHCP client when its IP address lease has expired?

a DHCPREQUEST unicast message

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

broadcast DHCPREQUEST

What is the reason that an ISP commonly assigns a DHCP address to a wireless router in a SOHO environment?

easy IP address management

Which command, when issued in the interface configuration mode of a router, enables the interface to acquire an IPv4 address automatically from an ISP, when that link to the ISP is enable?

ip address dhcp

What information can be verified through the show ip dhcp binding command?

the IPv4 addresses that are assigned to hosts by the DHCP server