Network Protocols Quiz

What is a characteristic of VRRPv3?

• VRRPv3 is Cisco proprietary.

• It supports IPv6 and IPv4 addressing.

• It works together with HSRP.

• It allows load balancing between routers.

Which type of VLAN-hopping attack may be prevented by designating an unused VLAN as the native VLAN?

• DHCP spoofing

• DHCP starvation

• VLAN double-tagging

• DTP spoofing

Which feature on a switch makes it vulnerable to VLAN hopping attacks?

• the mixed duplex mode enabled for all ports by default

• the limited size of content-addressable memory space

• mixed port bandwidth support enabled for all ports by default

• the automatic trunking port feature enabled for all ports by default

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

• IRDP

• GLBP

• VRRPv3

• GLBP for IPv6

What security benefit is gained from enabling BPDU guard on PortFast enabled interfaces?

• preventing buffer overflow attacks

• preventing rogue switches from being added to the network

• protecting against Layer 2 loops

• enforcing the placement of root bridges

A network administrator is configuring port security on a Cisco switch. The company security policy specifies that when a violation occurs, packets with unknown source addresses should be dropped and no notification should be sent. Which violation mode should be configured on the interfaces?

• off

• restrict

• protect

• shutdown

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 across multiple switches.

• 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.

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

• VRRPv3

• HSRP

• HSRP for IPv6

• VRRPv2

Which type of VLAN-hopping attack may be prevented by designating an unused VLAN as the native VLAN?

• DHCP spoofing

• DHCP starvation

• VLAN double-tagging

• DTP spoofing

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

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

• Use the open standard LLDP rather than CDP.

• Use the default router settings for CDP and LLDP.

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