CCNP Switch FAQ: Configuring DHCP

CCNP Switch FAQ: Configuring DHCP

Q1. If a DHCP scope is configured on a Catalyst switch, which one of the following must also be configured so that the switch becomes a DHCP server for client machines connected to VLAN 3?
a. A correspondingip dhcp server command configured on interface VLAN 3
b. A corresponding IP address configured on interface VLAN 3
c. Anip helper-address command configured on interface VLAN 3
d. A switch cannot operate as a DHCP server

Answer: B

Q2. Which one of the following commands can be used to prevent IP addresses 192.168.16.10 through 192.168.16.30 from being assigned by the DHCP server running on a switch?
a. ip dhcp reserve-address 192.168.16.10 – 192.168.16.30
b. ip dhcp pool users
no network 192.168.16.10 192.168.16.30
c. ip dhcp excluded-address 192.168.16.10 192.168.16.30
d. ip dhcp pool users
no lease 192.168.16.10 192.168.16.30

Answer: C

Q3. To configure a manual DHCP binding for two different IP addresses, which one of the following approaches should you take?
a. Define two DHCP pools that contain a single host address each.
b. Define a DHCP pool that contains the network of the host addresses.
c. Enter twoip dhcp excluded-address commands to configure the host addresses.
d. Define one DHCP pool that contains ahost command for each host address binding.

Answer: A

Q4. Which one of the following answers represents configuration commands needed to implement a DHCP relay function?
a. interface vlan 5
ip address 10.1.1.1 255.255.255.0
ip helper-address 10.1.1.10
b. interface vlan 5
ip address 10.1.1.1 255.255.255.0
ip dhcp-relay
c. ip dhcp pool staff
network 10.1.1.0 255.255.255.0
default-router 10.1.1.1
exit
d. hostname Switch
ip helper-address 10.1.1.10

Answer: A

Q5. Which one of the following commands can be used to display IPv4 addresses that have been assigned through the DHCP server on a switch?
a. show ip dhcp pool
b. show ip dhcp clients
c. show ip dhcp binding
d. show ip dhcp leases

Answer: C

Q6. Which one of the following forms of IPv6 address does a host use to discover its local router?
a. CDPv6
b. ICMPv6
c. Stateless address
d. Link-local address

Answer: D

Q7. Without a DHCP server available, which one of the following represents a valid
method for a host to obtain a unique IPv6 address?
a. The local switch interface will assign one, provided it has an IPv6 address
configured
b. Stateless autoconfiguration
c. DHCP relay
d. Link-local address proxy

Answer: B

Q8. To exclude specific IPv6 addresses from being handed out by a DHCPv6 server configured on a Catalyst switch, which one of the following describes the correct strategy?
a. Enter theip dhcp excluded-address command along with the IPv6 addresses to exclude.
b. Enter theno address prefixipv6-address command as part of the DHCPv6 pool configuration.
c. Define a separate DHCPv6 pool for each excluded address.
d. None of these answers; you cannot exclude addresses with DHCPv6.

Answer: D

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