Connecting Networks Version 6 – CN Chapter 3 Exam

Connecting Networks (Version 6.00) – CN Chapter 3 Exam

QUESTION 1

Which OSPFv3 function works differently from OSPFv2?election process

metric calculation

authentication*

hello mechanism

OSPF packet types

Both versions of OSPF use the same five basic packet types, the cost metric, and the DR/BDR election process. Hello packets are used in both versions to build adjacencies. OSPFv3, however, uses advanced encryption and authentication features that are provided by IPsec, while OSPFv2 uses either plain text or MD5 authentication.

QUESTION 2

What are two requirements to be able to configure an EtherChannel between two switches? (Choose two.)

All interfaces need to be assigned to different VLANs.

Different allowed ranges of VLANs must exist on each end.

The interfaces that are involved need to be contiguous on the switch.

All the interfaces need to be working in the same duplex mode.*

All the interfaces need to work at the same speed.*

All interfaces in the EtherChannel bundle must be assigned to the same VLAN or be configured as a trunk. If the allowed range of VLANs is not the same, the interfaces do not form an EtherChannel even when set to auto or desirable mode.

QUESTION 3

On what type of OSPF router is interarea route summarization configured?intra-area routers

ASBRs

ABRs*

backbone routers

Interarea summarization is manually configured on Area Border Routers (ABRs). Because ABRs connect multiple areas, it is these routers that would summarize routes before injecting them into another area. ASBRs are configured with external route summarization. Backbone and intra-area routers have all interfaces in a single area and are not able to summarize routes into other areas.

QUESTION 4

Which three steps should be taken before moving a Cisco switch to a new VTP management domain? (Choose three.)

Configure the switch with the name of the new management domain.*

Reset the VTP counters to allow the switch to synchronize with the other switches in the domain.

Select the correct VTP mode and version.*

Download the VTP database from the VTP server in the new domain.

Reboot the switch.*

Configure the VTP server in the domain to recognize the BID of the new switch.

When adding a new switch to a VTP domain, it is critical to configure the switch with a new domain name, the correct VTP mode, VTP version number, and password. A switch with a higher revision number can propagate invalid VLANs and erase valid VLANs thus preventing connectivity for multiple devices on the valid VLANs.

QUESTION 5

Which two commands are used in the implementation of a dynamic IPv4 routing protocol? (Choose two.)line

ip route

network*

router*

interface

In order to implement RIP, EIGRP, or OSPF, configuration begins by typing router protocol. An example would be router ospf 1. In IPv4, network statements are added for each directly connected network that is participating in the dynamic routing protocol. An example would be network 192.168.10.0 0.0.0.255 area 0.

QUESTION 6

What is the reason for a network engineer to alter the default reference bandwidth parameter when configuring OSPF?

to force that specific link to be used in the destination route

to more accurately reflect the cost of links greater than 100 Mb/s*

to enable the link for OSPF routing

to increase the speed of the link

By default, Fast Ethernet, Gigabit, and 10 Gigabit Ethernet interfaces all have a cost of 1. Altering the default reference bandwidth alters the cost calculation, allowing each speed to be more accurately reflected in the cost.

QUESTION 7

Which technology is an open protocol standard that allows switches to automatically bundle physical ports into a single logical link?

LACP*

PAgP

DTP

Multilink PPP

LACP, or Link Aggregation Control Protocol, is defined by IEEE 802.3ad and is an open standard protocol. LACP allows switches to automatically bundle switch ports into a single logical link to increase bandwidth. PAgP, or Port Aggregation Protocol, performs a similar function, but it is a Cisco proprietary protocol. DTP is Dynamic Trunking Protocol and is used to automatically and dynamically build trunks between switches. Multilink PPP is used to load-balance PPP traffic across multiple serial interfaces.

QUESTION 8

Refer to the exhibit. The partial configuration that is shown was used to configure router on a stick for VLANS 10, 30, and 50. However, testing shows that there are some connectivity problems between the VLANs. Which configuration error is causing this problem?

There is no IP address configured for the FastEthernet 0/0 interface.

The wrong VLAN has been configured on subinterface Fa0/0.50.*

A configuration for the native VLAN is missing.

The VLAN IP addresses should belong to the same subnet.

According to the configuration shown, the router was configured to use the wrong VLAN (500 instead of 50) on subinterface Fa0/0.50. This will prevent devices that are configured on VLAN 50 from communicating with subinterface Fa0/0.50. When configuring subinterfaces, the Fa0/0 interface has to be configured with no IP address, and each subinterface has to be assigned to a different subnet.

QUESTION 9

Refer to the exhibit. A network administrator issues the show ip protocols command. Based on the exhibited output, what can be concluded?

The EIGRP K values are default values.*

R1 receives routes to the network 192.168.1.0/24 and 10.0.0.0/24.

Up to 4 routes of different metric values to the same destination network will be included in the routing table.

The no auto-summary command is not applied for the EIGRP operation.

The output indicates that the K values are in default (K1=1, K2=0, K3=1, K4=0, K5=0). The no auto-summary command is used since automatic summarization is not in effect. R1 is advertising the 192.168.1.0 and 10.0.0.0 networks, not receiving advertisements about them. Up to 4 equal metric paths to the same destination network will be included in the routing table since the metric variance parameter is set to 1.

QUESTION 10

Which two statements are characteristics of routed ports on a multilayer switch? (Choose two.)In a switched network, they are mostly configured between switches at the core and distribution layers.*

They are not associated with a particular VLAN.*

The interface vlan command has to be entered to create a VLAN on routed ports.

They are used for point-to-multipoint links.

They support subinterfaces, like interfaces on the Cisco IOS routers.

Routed ports are physical ports that act similarly to a router interface. They are not associated with a particular VLAN, they do not support subinterfaces, and they are used for point-to-point links. In a switched network, they are mostly configured between switches at the core and distribution layers. To configure routed ports, the no switchport interface command has to be used on the appropriate ports.

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