ccna2 theory 150-165

Question 1

What IPv6 prefix is designed for link-local communication

Answer 1

fe80

Question 2

What is the effect of entering the ip dhcp snooping limit rate 6 configuration command on a switch?

Answer 2

It restricts the number of discovery messages, per second, to be received on the interface.

Question 3

A network administrator is configuring a WLAN. Why would the administrator change the default DHCP IPv4 addresses on an AP?

Answer 3

to reduce outsiders intercepting data or accessing the wireless network by using a well-known address range

Question 4

What is the effect of entering the ip arp inspection validate src-mac configuration command on a switch?

Answer 4

It checks the source L2 address in the Ethernet header against the sender L2 address in the ARP body

Question 5

What protocol or technology is a Cisco proprietary protocol that is automatically enabled on 2960 switches

Answer 5

DTP

Question 6

What address and prefix length is used when configuring an IPv6 default static route?

Answer 6

::/0

Question 7

What are two characteristics of Cisco Express Forwarding (CEF)? (Choose two.)

Answer 7

This is the fastest forwarding mechanism on Cisco routers and multilayer switches.
Packets are forwarded based on information in the FIB and an adjacency table.

Question 8

Which term describes the role of a Cisco switch in the 802.1X port-based access control?

Answer 8

authenticator

Question 9

Which Cisco solution helps prevent ARP spoofing and ARP poisoning attacks?

Answer 9

Dynamic ARP Inspection

Question 10

What is an advantage of PVST+?

Answer 10

PVST+ optimizes performance on the network through load sharing.

Question 11

What protocol or technology uses a standby router to assume packet-forwarding responsibility if the active router fails?

Answer 11

HSRP

Question 12

What is the effect of entering the show ip dhcp snooping binding configuration command on a switch?

Answer 12

It displays the IP-to-MAC address associations for switch interfaces.

Question 13

What action takes place when the source MAC address of a frame entering a switch is in the MAC address table?

Answer 13

The switch updates the refresh timer for the entry.

Question 14

A small publishing company has a network design such that when a broadcast is sent on the LAN, 200 devices receive the transmitted broadcast. How can the network administrator reduce the number of devices that receive broadcast traffic?

Answer 14

Segment the LAN into smaller LANs and route between them.*

Question 15

What defines a host route on a Cisco router?

Answer 15

An IPv4 static host route configuration uses a destination IP address of a specific device and a /32 subnet mask.