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New Cisco 200-125 Exam Dumps Collection (Question 6 - Question 15)

New Questions 6

Which command can be used from a router to verify the Layer 3 path to a host?

A. tracert address

B. traceroute address

C. telnet address

D. ssh address

Answer: B

New Questions 7

Which component of a routing table entry represents the subnet mask?

A. routing protocol code

B. prefix

C. metric

D. network mask

Answer: D

Explanation:

IP Routing Table Entry Types

An entry in the IP routing table contains the following information in the order presented: Network ID.The network ID or destination corresponding to the route. The network ID can be class-based, subnet, or supernet network ID, or an IP address for a host route. Network Mask.The mask that is used to match a destination IP address to the network ID. Next Hop.The IP address of the next hop.

Interface.An indication of which network interface is used to forward the IP packet. Metric.A number used to indicate the cost of the route so the best route among possible multiple routes to the same destination can be selected. A common use of the metric is to indicate the number of hops (routers crossed) to the network ID.

Routing table entries can be used to store the following types of routes:

Directly Attached Network IDs.Routes for network IDs that are directly attached. For directly attached networks, the Next Hop field can be blank or contain the IP address of the interface on that network.

Remote Network IDs.Routes for network IDs that are not directly attached but are available across other routers. For remote networks, the Next Hop field is the IP address of a local router in between the forwarding node and the remote network.

Host Routes.A route to a specific IP address. Host routes allow routing to occur on a per-

IP address basis. For host routes, the network ID is the IP address of the specified host and the network mask is 255.255.255.255.

Default Route.The default route is designed to be used when a more specific network ID or host route is not found. The default route network ID is 0.0.0.0 with the network mask of 0.0.0.0.

New Questions 8

Which statement about slow inter VLAN forwarding is true?

A. The VLAN is experiencing slowness in the point-to-point collisionless connection.

B. The VLANs are experiencing slowness because multiple devices are connected to the same hub.

C. The local VLAN is working normally, but traffic to the alternate VLAN is forwarded slower than expected.

D. The entire VLAN is experiencing slowness.

E. The VLANs are experiencing slowness due to a duplex mismatch.

Answer: E

Explanation:

Common Causes of Slow IntraVLAN and InterVLAN Connectivity

The symptoms of slow connectivity on a VLAN can be caused by multiple factors on different network layers. Commonly the network speed issue may be occurring on a lower level, but symptoms can be observed on a higher level as the problem masks itself under the term "slow VLAN". To clarify, this document defines the following new terms: "slow collision domain", "slow broadcast domain" (in other words, slow VLAN), and "slow interVLAN forwarding". These are defined in the sectionThree Categories of Causes, below.

In the following scenario (illustrated in the network diagram below), there is a Layer 3 (L3) switch performing interVLAN routing between the server and client VLANs. In this failure scenario, one server is connected to a switch, and the port duplex mode is configured half- duplex on the server side and full-duplex on the switch side. This misconfiguration results in a packet loss and slowness, with increased packet loss when higher traffic rates occur on the link where the server is connected. For the clients who communicate with this server, the problem looks like slow interVLAN forwarding because they do not have a problem communicating to other devices or clients on the same VLAN. The problem occurs only when communicating to the server on a different VLAN. Thus, the problem occurred on a single collision domain, but is seen as slow interVLAN forwarding.

Three Categories of Causes

The causes of slowness can be divided into three categories, as follows:

Slow Collision Domain Connectivity

Collision domain is defined as connected devices configured in a half-duplex port configuration, connected to each other or a hub. If a device is connected to a switch port and full-duplex mode is configured, such a point-to-point connection is collisionless.

Slowness on such a segment still can occur for different reasons.

Slow Broadcast Domain Connectivity (Slow VLAN)

Slow broadcast domain connectivity occurs when the whole VLAN (that is, all devices on the same VLAN) experiences slowness.

Slow InterVLAN Connectivity (Slow Forwarding Between VLANs)

Slow interVLAN connectivity (slow forwarding between VLANs) occurs when there is no slowness on the local VLAN, but traffic needs to be forwarded to an alternate VLAN, and it is not forwarded at the expected rate.

Causes for Network Slowness Packet Loss

In most cases, a network is considered slow when higher-layer protocols (applications) require extended time to complete an operation that typically runs faster. That slowness is caused by the loss of some packets on the network, which causes higher-level protocols like TCP or applications to time out and initiate retransmission.

Hardware Forwarding Issues

With another type of slowness, caused by network equipment, forwarding (whether Layer 2 [L2] or L3) is performed slowly. This is due to a deviation from normal (designed) operation and switching to slow path forwarding. An example of this is when Multilayer Switching (MLS) on the switch forwards L3 packets between VLANs in the hardware, but due to misconfiguration, MLS is not functioning properly and forwarding is done by the router in the software (which drops the interVLAN forwarding rate significantly).

New Questions 9

Which IPv6 header field is equivalent to the TTL?

A. Hop Limit

B. Flow Label

C. TTD

D. Hop Count

E. Scan Timer

Answer: A

New Questions 10

Which tow options describe benefits of aggregated chassis technology? (Choose two.)

A. It requires only three IP addresses per VLAN.

B. It reduces management overhead.

C. It requires only one IP address per VLAN.

D. It supports redundant configuration files.

E. It supports HSRP, VRRP, and GLBP.

F. Switches can be located anywhere regardless of their physical distance from one another.

Answer: B,C

New Questions 11

In which byte of an IP packet can traffic be marked?

A. the ToS byte

B. the QoS byte

C. the DSCP byte

D. the CoS byte

Answer: A

New Questions 12

What is the purpose of the POST operation on a router?

A. determine whether additional hardware has been added

B. locate an IOS image for booting

C. enable a TFTP server

D. set the configuration register

Answer: A

New Questions 13

How can you disable DTP on a switch port?

A. Configure the switch port as a trunk.

B. Add an interface on the switch to a channel group.

C. Change the operational mode to static access.

D. Change the administrative mode to access.

Answer: A

New Questions 14

Which identification number is valid for an extended ACL?

A. 1

B. 64

C. 99

D. 100

E. 299

F. 1099

Answer: D

New Questions 15

R1#show running-config interface Loopback0

description ***Loopback***

ip address 192.168.1.1 255.255.255.255

ip ospf 1 area 0

!

interface Ethernet0/0

description **Connected to R1-LAN** ip address 10.10.110.1 255.255.255.0

ip ospf 1 area 0

!

interface Ethernet0/1

description **Connected to L2SW**

ip address 10.10.230.1 255.255.255.0

ip ospf hello-interval 25 ip ospf 1 area 0

!

router ospf 1

log-adjacency-changes

R2# show running-config

R2

!

interface Loopback0 description **Loopback**

ip address 192.168.2.2 255.255.255.255

ip ospf 2 area 0

!

interface Ethernet0/0

description **Connected to R2-LAN** ip address 10.10.120.1 255.255.255.0

ip ospf 2 area 0

!

interface Ethernet0/1

description **Connected to L2SW**

ip address 10.10.230.2 255.255.255.0

ip ospf 2 area 0

!

router ospf 2

log-adjacency-changes

R3#show running-config R3

username R6 password CISCO36

!

interface Loopback0 description **Loopback**

ip address 192.168.3.3 255.255.255.255

ip ospf 3 area 0

!

interface Ethernet0/0

description **Connected to L2SW**

ip address 10.10.230.3 255.255.255.0

ip ospf 3 area 0

!

interface Serial1/0

description **Connected to R4-Branch1 office** ip address 10.10.240.1 255.255.255.252

encapsulation ppp ip ospf 3 area 0

!

interface Serial1/1

description **Connected to R5-Branch2 office** ip address 10.10.240.5 255.255.255.252

encapsulation ppp

ip ospf hello-interval 50 ip ospf 3 area 0

!

interface Serial1/2

description **Connected to R6-Branch3 office** ip address 10.10.240.9 255.255.255.252

encapsulation ppp ip ospf 3 area 0

ppp authentication chap

!

router ospf 3

router-id 192.168.3.3

!

R4#show running-config R4

!

interface Loopback0 description **Loopback**

ip address 192.168.4.4 255.255.255.255

ip ospf 4 area 2

!

interface Ethernet0/0

ip address 172.16.113.1 255.255.255.0

ip ospf 4 area 2

!

interface Serial1/0

description **Connected to R3-Main Branch office** ip address 10.10.240.2 255.255.255.252

encapsulation ppp ip ospf 4 area 2

!

router ospf 4

log-adjacency-changes

R5#show running-config R5

!

interface Loopback0 description **Loopback**

ip address 192.168.5.5 255.255.255.255

ip ospf 5 area 0

!

interface Ethernet0/0

ip address 172.16.114.1 255.255.255.0

ip ospf 5 area 0

!

interface Serial1/0

description **Connected to R3-Main Branch office** ip address 10.10.240.6 255.255.255.252

encapsulation ppp ip ospf 5 area 0

!

router ospf 5

log-adjacency-changes

R6#show running-config R6

username R3 password CISCO36

!

interface Loopback0 description **Loopback**

ip address 192.168.6.6 255.255.255.255

ip ospf 6 area 0

!

interface Ethernet0/0

ip address 172.16.115.1 255.255.255.0

ip ospf 6 area 0

!

interface Serial1/0

description **Connected to R3-Main Branch office** ip address 10.10.240.10 255.255.255.252

encapsulation ppp ip ospf 6 area 0

ppp authentication chap

!

router ospf 6

router-id 192.168.3.3

!

An OSPF neighbor adjacency is not formed between R3 in the main office and R5 in the Branch2 office. What is causing the problem?

A. There is an area ID mismatch.

B. There is a PPP authentication issue; a password mismatch.

C. There is an OSPF hello and dead interval mismatch.

D. There is a missing network command in the OSPF process on R5.

Answer: C

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