Mod 7

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

DHCP, 67

DHCP Process drag n drop

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

The address pool of a DHCP server is configured with 10.19.44.0/24. The network administrator reserves 6 IP addresses for servers. How many IP addresses are left in the pool to be assigned to other hosts? a. 248 b. 246 c. 238 d. 252 e. 249

a. 248

A company uses DHCP servers to dynamically assign IPv4 addresses to employee workstations. The address lease duration is set as 5 days. An 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? a. FF-FF-FF-FF-FF-FF and 255.255.255.255 b. both MAC and IPv4 addresses of the DHCP server c. MAC address of the DHCP server and 255.255.255.255 d. FF-FF-FF-FF-FF-FF and Ipv4 address of the DHCP server

a. FF-FF-FF-FF-FF-FF and 255.255.255.255

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? a. The Cisco router will exclude 15 IP addresses from being leased to DHCP clients b. The Cisco router will allow only the specified IP addresses to be leased to clients c. The Cisco router will exclude only the 10.0.15.1 and 10.0.15.15 IP addresses from being leased to DHCP clients d. The Cisco router will automatically create a DHCP pool using a /28 mask

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

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? a. set the WAN connection in the wireless router as a DHCP client b. Set the DSL modem as a DHCP client to get a public IP address from the wireless router c. Set the connection between the wireless router and the DSL modem as a private IP network d. Set the DSL modem as a DHCP client to the phone company and a DHCP server for the internal connection

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

Which statement is true about DHCP operation? a. If the client receives several DHCPOFFER messages from different servers, it sends a unicast DHCPREQUEST message to the server from which it chooses to obtain the IP information b. A client must wait for lease expiration before it sends another DHCPREQUEST message c. 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 d. The DHCPFISCOVER message contains the IP address and subnet mask to be assigned, the IP address of the DNS server, and the IP address of the default gateway

c. 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

Which set of commands will configure a router as a DHCP server that will assign IPv4 addresses to the 192.168.100.0/23 LAN while reserving the first 10 and the last addresses for static assignment?

ip dhcp excluded-address 192.168.100.1 192.168.100.10 ip dhcp excluded-address 192.168.101.254 ip dhcp pool LAN-POOL-100 network 192.168.100.0 255.255.254.0 default-router 192.168.100.1

DHCP Message types drag n drop

DHCPREQUEST: a message that is used to identify the explicit server and lease offer to accept DHCPDISCOVER: a message that is used to locate any available DHCP server on a network DHCPOFFER: a message that is used to suggest a lease to a client DHCPACK: a message that is used to acknowledge that the lease is successful

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? a. 114 b. 106 c. 116 d. 120 e. 117

c. 116

What is an advantage of configuring a Cisco router as a relay agent? a. It will allow DHCPDISCOVER messages to pass without alteration b. It can forward both broadcast and multicast messages on behalf of other clients c. It can provide relay service for multiple UDP services d. It reduces the response time from a DHCP server

c. It can provide relay service for multiple UDP services

A client device on an Ethernet segment needs and IP address in order to communicate on the network. A DHCP server 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? a. Send a DHCPREQUEST packet to IP address 255.255.255.255 b. Send a DHCPACK packer to the default gateway address c. Send a DHCPDISCOVER message to physical address FF-FF-FF-FF-FF-FF d. Use a statically configured IP address from the pool of IP addresses that is offered by the DHCP server.

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

What is the reason that an ISP commonly assigns a DHCP address to a wireless router in a SOHO environment? a. better connectivity b. better network performance c. easy IP address management d. easy configuration on ISP firewall

c. easy IP address management

Refer to the exhibit. PC1 is configured to obtain a dynamic IP address from the DHCP server. PC1 had been shut down for two weeks. When PC1 boots and tries to request and available IP address, which destination IP address will PC1 place in the IP header? a. 192.168.1.1 b. 192.168.1.8 c. 192.168.1.255 d. 255.255.255.255

d. 255.255.255.255

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? a. DHCPDISCOVER b. DHCPOFFER c. DHCPREQUEST d. DHCPACK e. DHCPNACK

d. DHCPACK

What is a result when the DHCP servers are not operational in a network? a. Workstations are assigned with the IP address 0.0.0.0 b. Workstations are assigned with the IP address 127.0.0.1 c. Workstations are assigned with IP addresses in the 10.0.0.0/8 network d. Workstations are assigned with IP addresses in the 169.254.0.0/16

d. Workstations are assigned with IP addresses in the 169.254.0.0/16

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? a. 46 b. 57 c. 54 d. 36 e. 44

e. 44

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 ports are used to forward DHCP traffic?

67, 68