CCNA 2 SRWE – Switching, Routing, and also Wireless Essentials (Version 7.00) – Modules 7 – 9 – accessible and dependable Networks test Answers

Match each DHCP message type with that is description. (Not all choices are used.)


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CCNA 2 SRWE v7 Modules 7 – 9 – available and reputable Networks test Answers 01


192.168.1.1192.168.1.8192.168.1.255255.255.255.255
Answers Explanation & Hints:

When a host boots and has to be configured for dynamic IP addressing, the an equipment tries to acquire a valid IP address. It sends out a DHCPDISCOVER message. This is a transfer message since the DHCP server address is unknown (by design). The location IP deal with in the IP header is 255.255.255.255 and the location MAC attend to is FF:FF:FF:FF:FF:FF.

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A firm uses DHCP servers come dynamically assign IPv4 addresses come employee workstations. The resolve lease expression is collection as 5 days. One employee returns to the office after an absence of one week. Once the employee boots the workstation, it sends out a blog post to attain an IP address. I beg your pardon Layer 2 and Layer 3 destination addresses will the post contain?

FF-FF-FF-FF-FF-FF and 255.255.255.255both MAC and also IPv4 addresses of the DHCP serverMAC attend to of the DHCP server and 255.255.255.255FF-FF-FF-FF-FF-FF and IPv4 address of the DHCP server
Answers Explanation & Hints:

When the lease of a dynamically assigned IPv4 deal with has expired, a workstation will send a DHCPDISCOVER blog post to start the procedure of obtaining a precious IP address. Due to the fact that the workstation does not recognize the addresses the DHCP servers, it sends the post via broadcast, with location addresses that FF-FF-FF-FF-FF-FF and 255.255.255.255.

Which command will allow a network administrator to inspect the IP resolve that is assigned to a specific MAC address?

Router# display ip dhcp bindingRouter# display ip dhcp poolRouter# show ip dhcp server statisticsRouter# display running-config ns section_dhcp
Answers Explanation & Hints:

The display ip dhcp binding command will display the leases, including IP addresses, MAC addresses, lease expiration, kind of lease, customer ID, and also user name.

Which post does one IPv4 organize use come reply once it obtain a DHCPOFFER article from a DHCP server?

DHCPACKDHCPDISCOVERDHCPOFFERDHCPREQUEST
Answers Explanation & Hints:

When the client receives the DHCPOFFER indigenous the server, the sends ago a DHCPREQUEST transfer message. ~ above receiving the DHCPREQUEST message, the server replies v a unicast DHCPACK message.

Which command, as soon as issued in the interface configuration mode of a router, enables the interface to obtain an IPv4 deal with automatically from an ISP, once that attach to the ISP is enabled?

ip dhcp poolip deal with dhcpservice dhcpip helper-address
Answers Explanation & Hints:

The ip address dhcp user interface configuration command configures one Ethernet interface as a DHCP client. The company dhcp global configuration command enables the DHCPv4 server process on the router. The ip helper-address command is approve to allow DHCP relay ~ above the router. The ip dhcp pool command creates the surname of a swimming pool of addresses the the server can assign come hosts.

Which collection of commands will configure a router together a DHCP server that will certainly assign IPv4 addresses to the 192.168.100.0/23 LAN when reserving the very first 10 and the critical addresses for revolution assignment?

ip dhcp excluded-address 192.168.100.1 192.168.100.10ip dhcp excluded-address 192.168.100.254ip dhcp swimming pool LAN-POOL-100network 192.168.100.0 255.255.255.0ip default-gateway 192.168.100.1ip dhcp excluded-address 192.168.100.1 192.168.100.10ip dhcp excluded-address 192.168.101.254ip dhcp swimming pool LAN-POOL-100network 192.168.100.0 255.255.254.0default-router 192.168.100.1dhcp pool LAN-POOL-100ip dhcp excluded-address 192.168.100.1 192.168.100.9ip dhcp excluded-address 192.168.100.254network 192.168.100.0 255.255.254.0default-router 192.168.101.1ip dhcp excluded-address 192.168.100.1 192.168.100.9ip dhcp excluded-address 192.168.101.254ip dhcp swimming pool LAN-POOL-100ip network 192.168.100.0 255.255.254.0ip default-gateway 192.168.100.1

Answers Explanation & Hints:

The /23 prefix is identical to a network mask that 255.255.254.0. The network usable IPv4 address range is 192.168.100.1 to 192.168.101.254 inclusive. The regulates dhcp swimming pool , ip default-gateway , and also ip network room not valid DHCP configuration commands.

Which kind of message is sent out by a DHCP client when that IP address lease has actually expired?​

a DHCPDISCOVER broadcast messagea DHCPREQUEST transfer message​a DHCPREQUEST unicast message​a DHCPDISCOVER unicast message​
Answers Explanation & Hints:

When the IP address lease time that the DHCP client expires, it sends out a DHCPREQUEST unicast message straight to the DHCPv4 server the originally available the IPv4 address.

A host PC is attempting to lease an attend to through DHCP. What article is sent out by the server to let the customer know the is maybe to usage the noted IP information?

DHCPDISCOVERDHCPOFFERDHCPREQUESTDHCPACKDHCPNACK
Answers Explanation & Hints:

When a organize uses DHCP to immediately configure an IP address, the commonly sends 2 messages: the DHCPDISCOVER message and the DHCPREQUEST message. These two messages are usually sent out as broadcasts to ensure the all DHCP servers receive them. The servers respond to these messages making use of DHCPOFFER, DHCPACK, and also DHCPNACK messages, depending on the circumstance.

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

Workstations space assigned v the IP deal with 0.0.0.0.Workstations space assigned through the IP deal with 127.0.0.1.Workstations are assigned v IP addresses in the 10.0.0.0/8 network.Workstations space assigned through IP addresses in the 169.254.0.0/16 network.
Answers Explanation & Hints:

When workstations room configured with obtaining IP attend to automatically yet DHCP servers space not accessible to respond to the requests, a workstation can assign chin an IP addresses from the 169.254.0.0/16 network.

What is one indication the a Windows computer system did not get an IPv4 attend to from a DHCP server?

The computer cannot ping 127.0.0.1.Windows display screens a DHCP timeout message.The computer system receives one IP resolve that starts with 169.254.The computer system cannot ping other tools on the same network with IP addresses in the 169.254.0.0/16 range.
Answers Explanation & Hints:

When a Windows computer cannot interact with an IPv4 DHCP server, the computer automatically assigns one IP resolve in the 169.254.0.0/16 range. Any other maker on the exact same network the receives an address in the same variety is reachable.​

Which DHCPv4 post will a client send to expropriate an IPv4 address that is readily available by a DHCP server?

unicast DHCPACKbroadcast DHCPACKunicast DHCPREQUESTbroadcast DHCPREQUEST
Answers Explanation & Hints:

When a DHCP client receives DHCPOFFER messages, it will send a broadcast DHCPREQUEST message for 2 purposes. First, it suggests to the supplying DHCP server the it would prefer to expropriate the offer and bind the IP address. Second, it notifies any kind of other responding DHCP servers that their provides are declined.

A small coffee shop is offering free Wi-Fi come customers. The network contains a wireless router and also a DSL modem that is linked to the regional phone company. What technique is frequently used to configure the link to the phone call company?

Set the WAN link in the wireless router as a DHCP client.Set the DSL modem as a DHCP client to gain a windy IP attend to from the wireless router.Set the connection in between the wireless router and the DSL modem as a personal IP network.Set the DSL modem as a DHCP customer to the phone company and a DHCP server for the inner connection.
Answers Explanation & Hints:

In a SOHO environment, a wireless router connects to an ISP via a DSL or cable modem. The IP attend to between the wireless router and also ISP website is frequently assigned by the ISP v DHCP. The DSL modem does not regulate IP resolve allocation.

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

better connectivitybetter network performanceeasy IP attend to managementeasy construction on ISP firewall
Answers Explanation & Hints:

In a SOHO environment, a wireless router connects to the ISP via a DSL or cable modem. The IP resolve between the wireless router and ISP website is typically assigned by the ISP with DHCP. This method facilitates the IP addressing monitoring in the IP addresses because that clients space dynamically assigned so the if a customer is dropped, the assigned IP address can be conveniently reassigned to an additional client.

A company uses DHCP to control IP attend to deployment because that employee workstations. The IT department deploys lot of DHCP servers in the data center and also uses DHCP relay agents to facilitate the DHCP requests indigenous workstations. Which 2 UDP harbor are provided to front DHCP traffic? (Choose two.)

2353676880
Answers Explanation & Hints:

The DHCP protocol operates v 2 UDP ports. UDP port 67 is the destination port because that DHCP servers, and also DHCP clients usage UDP port 68.

What information can be proved through the present ip dhcp binding command?

the variety of IP addresses staying in the DHCP poolthe IPv4 addresses that have been excluded native the DHCPv4 poolthat DHCPv4 uncover messages space still being obtained by the DHCP serverthe IPv4 addresses that room assigned to master by the DHCP server
Answers Explanation & Hints:

The show ip dhcp binding command mirrors a list of IPv4 addresses and also the MAC addresses that the master to i m sorry they are assigned. Making use of this information an administrator deserve to determine which hold interfaces have actually been assigned to details hosts.

A customer device on an Ethernet segment requirements an IP address in order to interact on the network. A DHCP server with IP address 192.168.1.1 has actually been configured and permitted on the network. How will a client device attain a usable IP address for this network?

Send a DHCPREQUEST packet come IP attend to 255.255.255.255.Send a DHCPACK packet to the default gateway address.Send a DHCPDISCOVER message to physical address FF-FF-FF-FF-FF-FF.Use a statically configured IP address from the swimming pool of IP addresses the is offered by the DHCP server.
Answers Explanation & Hints:

Like IP addressing, there is additionally a unique MAC attend to for broadcast purposes: FF-FF-FF-FF-FF-FF. When a DHCP customer needs to send a DHCP uncover message in order to seek DHCP servers, the customer will usage this MAC resolve as the location MAC deal with in the Ethernet frame. The does this because it has no knowledge of the IP and also MAC addresses the DHCP servers.

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

The Cisco router will certainly exclude 15 IP addresses from gift leased to DHCP clients.The Cisco router will enable only the specified IP addresses to be leased come clients.The Cisco router will exclude only the 10.0.15.1 and also 10.0.15.15 IP addresses from being leased come DHCP clients.The Cisco router will automatically create a DHCP pool using a /28 mask.
Answers Explanation & Hints:

The ip dhcp excluded-address command is followed by the very first and the last addresses to it is in excluded from being leased to DHCP clients.

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

It will permit DHCPDISCOVER messages to happen without alteration.It deserve to forward both broadcast and multicast messages on behalf of clients.It can administer relay solutions for lot of UDP services.It reduce the response time indigenous a DHCP server.
Answers Explanation & Hints:

By default, the ip helper-address command forwards the adhering to eight UDP services:Port 37: TimePort 49: TACACSPort 53: DNSPort 67: DHCP/BOOTP clientPort 68: DHCP/BOOTP serverPort 69: TFTPPort 137: NetBIOS surname servicePort 138: NetBIOS datagram service

Which declare is true about DHCP operation?​

If the customer receives numerous DHCPOFFER messages from various servers, it sends out a unicast DHCPREQUEST post to the server indigenous which it chooses to obtain the IP information.A customer must wait for lease expiration prior to it sends an additional DHCPREQUEST message.​When a machine that is configured to usage DHCP boots, the client broadcasts a DHCPDISCOVER message to identify any available DHCP servers ~ above the network.​The DHCPDISCOVER message consists of the IP resolve and subnet mask to it is in assigned, the IP deal with of the DNS server, and also the IP deal with of the default gateway.​
Answers Explanation & Hints:

The client broadcasts a DHCPDISCOVER post to identify any accessible DHCP servers on the network. A DHCP server replies with a DHCPOFFER message. This message offers to the client a lease that consists of such details as the IP attend to and subnet mask to be assigned, the IP resolve of the DNS server, and also the IP attend to of the default gateway. After the customer receives the lease, the received information must be renewed through one more DHCPREQUEST blog post prior come the lease expiration.

A company uses the technique SLAAC to configure IPv6 addresses because that the workstations the the employees. A network administrator configured the IPv6 address on the LAN user interface of the router. The interface status is UP. However, the workstations on the LAN segment go not obtain the correct prefix and also prefix length. What else need to be configured top top the router the is attached to the LAN segment for the workstations to attain the information?​

R1(config-if)# ipv6 enableR1(config)# ipv6 unicast-routingR1(config-if)# ipv6 nd other-config-flagR1(config)# ipv6 dhcp swimming pool
Answers Explanation & Hints:

A pc that is configured to use the SLAAC method obtains the IPv6 prefix and prefix length from a router. As soon as the pc boots, it sends an RS post to inform the routers that it requirements the information. A router sends an RA post that has the required information. Because that a router to have the ability to send RA messages, it need to be allowed as one IPv6 router by the unicast ipv6-routing command in worldwide configuration mode. The other alternatives are not offered to enable IPv6 routing top top a router.

A network administrator configures a router to send RA messages v M flag together 0 and O flag as 1. Which statement defines the result of this configuration when a computer tries to configure that IPv6 address?

It should contact a DHCPv6 server for all the details that that needs.It should use the information that is consisted of in the RA article exclusively.It need to use the information that is had in the RA message and also contact a DHCPv6 server for additional information.It should call a DHCPv6 server for the prefix, the prefix-length information, and an interface ID that is both random and also unique.

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Answers Explanation & Hints:

ICMPv6 RA message contain two flags to show whether a workstation have to use SLAAC, a DHCPv6 server, or a mix to configure the IPv6 address. These 2 flags are M flag and O flag. Once both flags are 0 (by default), a client must only use the information in the RA message. Once M flag is 0 and O flag is 1, a client should usage the details in the RA message and look for the various other configuration parameters (such as DNS server addresses) on DHCPv6 servers.

Refer come the exhibit. What have to be excellent to permit PC-A to get an IPv6 address from the DHCPv6 server?