R&S - Exam

Which protocol automates assignment of IP addresses on a network?

• DHCP

• DNS

• SMB

• TCP

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

• Router# show ip dhcp pool

• Router# show ip dhcp server statistics

• Router# show running-config I section_dhcp

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

• DHCPACK

• DHCPDISCOVER

• DHCPOFFER

• DHCPREQUEST

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

• a DHCPDISCOVER broadcast message

• a DHCPREQUEST broadcast message​

• a DHCPREQUEST unicast message​

• a DHCPDISCOVER unicast message​

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

• Workstations are assigned with the IP address 0.0.0.0.

• Workstations are assigned with the IP address 127.0.0.1.

• Workstations are assigned with IP addresses in the 10.0.0.0/8 network.

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

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

• The computer cannot ping 127.0.0.1.

• Windows displays a DHCP timeout message.

• The computer receives an IP address that starts with 169.254.

• The computer cannot ping other devices on the same network with IP addresses in the 169.254.0.0/16 range.

What is the result of a DHCP starvation attack?

• Legitimate clients are unable to lease IP addresses.

• Clients receive IP address assignments from a rogue DHCP server.

• The attacker provides incorrect DNS and default gateway information to clients.

• The IP addresses assigned to legitimate clients are hijacked.

What represents a best practice concerning discovery protocols such as CDP and LLDP on network devices?

• Use the open standard LLDP rather than CDP.

• Disable both protocols on all interfaces where they are not required.

• Use the default router settings for CDP and LLDP.

• Enable CDP on edge devices, and enable LLDP on interior devices.

Which protocol should be used to mitigate the vulnerability of using Telnet to remotely manage network devices?

• SCP

• SSH

• TFTP

• SNMP

Which statement describes the behavior of a switch when the MAC address table is full?

• It treats frames as unknown unicast and floods all incoming frames to all ports on the switch.

• It treats frames as unknown unicast and floods all incoming frames to all ports within the local VLAN.

• It treats frames as unknown unicast and floods all incoming frames to all ports within the collision domain.

• • It treats frames as unknown unicast and floods all incoming frames to all ports across multiple switches.