Breathing 200-105 Dumps Questions 2021

NEW QUESTION 1
In a GLBP network, who is responsible for the arp request?

• A. AVF
• B. AVG
• C. Actve Router
• D. Standby Router

Answer: B

NEW QUESTION 2



If required, what password should be configured on the DeepSouth router in the branch office to allow a connection to be established with the MidEast router?

• A. No password is required.
• B. Enable
• C. Secret
• D. Telnet
• E. Console

Answer: B

Explanation: In the diagram, DeepSouth is connected to Dubai’s S1/2 interface and is configured as follows:
Interface Serial1/2
IP address 192.168.0.5 255.255.255.252
Encapsulalation PPP ; Encapsulation for this interface is PPP Check out the following Cisco Link:
http://www.cisco.com/en/US/tech/tk713/tk507/technologies_configuration_example09186a 0080094333.shtml#configuringausernamedifferentfromtheroutersname
Here is a snipit of an example:
Network Diagram
If Router 1 initiates a call to Router 2, Router 2 would challenge Router 1, but Router 1 would not challenge Router 2. This occurs because the ppp authentication chap callin command is configured on Router 1. This is an example of a unidirectional authentication. In this setup, the ppp chap hostname alias-r1 command is configured on Router 1. Router 1 uses "alias-r1" as its hostname for CHAP authentication instead of "r1." The Router 2 dialer map name should match Router 1's ppp chap hostname; otherwise, two B channels are established, one for each direction.

NEW QUESTION 3
Which two options are primary responsibilities of the APIC-EM controller? (Choose two)

• A. It automates network actions between different device types.
• B. It provides robust asset management.
• C. It tracks license usage and Cisco IOS versions.
• D. It automates network actions between legacy equipment.
• E. It makes network functions programmable.

Answer: DE

NEW QUESTION 4
Which command do you enter to enable an interface to support PPPoE on a client?

• A. Dev1(config)# bba-group pppoe bba 1.
• B. Dev1(config-if)# pppoe-client dial-pool-number 1.
• C. Dev1(config-if)# pppoe enable group bba1.
• D. Dev1(config-if)# pppoe enable.

Answer: B

NEW QUESTION 5
Which two statements about using the CHAP authentication mechanism in a PPP link are true? (Choose two.)

• A. CHAP uses a two-way handshake.
• B. CHAP uses a three-way handshake.
• C. CHAP authentication periodically occurs after link establishment.
• D. CHAP authentication passwords are sent in plaintext.
• E. CHAP authentication is performed only upon link establishment.
• F. CHAP has no protection from playback attacks.

Answer: BC

Explanation: Understanding and Configuring PPP CHAP Authentication http://www.cisco.com/en/US/tech/tk713/tk507/technologies_tech_note09186a00800b4131. shtml
One-Way and Two-Way Authentication
CHAP is defined as a one-way authentication method. However, you use CHAP in both directions to create a two-way authentication. Hence, with two-way CHAP, a separate three-way handshake is initiated by each side. In the Cisco CHAP implementation, by default, the called party must authenticate the calling party (unless authentication is completely turned off). Therefore, a one-way authentication initiated by the called party is
the minimum possible authentication. However, the calling party can also verify the identity of the called party, and this results in a two-way authentication.
One-way authentication is often required when you connect to non-Cisco devices.

NEW QUESTION 6
DRAG DROP

Answer:

Explanation: + holddown timer: prevents a router from improperly reinstating a route from a regular routing update
+ split horizon: prevents information about a route from being sent in the direction from which the route was learned
+ defining a maximum: prevents invalid updates from looping the internetwork indefinitely
+ route poisoning: causes a routing protocol to advertise an infinite metric for a failed route
+ triggered update: decreases convergence time by immediately sending route information in response to a topology change

NEW QUESTION 7
In which solution is a router ACL used?

• A. filtering packets that are passing through a router
• B. to change the default administrative distance of a route in the route table
• C. protecting a server from unauthorized access
• D. controlling path selection, based on the route metric

Answer: A

NEW QUESTION 8
The internetwork infrastructure of company XYZ consists of a single OSPF area as shown in the graphic. There is concern that a lack of router resources is impeding internetwork performance. As part of examining the router resources, the OSPF DRs need to be known. All the router OSPF priorities are at the default and the router IDs are shown with each router.

Which routers are likely to have been elected as DR? (Choose two.)

• A. Corp-1
• B. Corp-2
• C. Corp-3
• D. Corp-4
• E. Branch-1
• F. Branch-2

Answer: DF

Explanation: There are 2 segments on the topology above which are separated by Corp-3 router. Each segment will have a DR so we have 2 DRs.
To select which router will become DR they will compare their router-IDs. The router with highest (best) router-ID will become DR. The router-ID is chosen in the order below:
The highest IP address assigned to a loopback (logical) interface.
If a loopback interface is not defined, the highest IP address of all active router’s physical interfaces will be chosen.
In this question, the IP addresses of loopback interfaces are not mentioned so we will consider IP addresses of all active router’s physical interfaces. Router Corp-4 (10.1.40.40)
& Branch-2 (10.2.20.20) have highest “active” IP addresses so they will become DRs.

NEW QUESTION 9
Which Layer 2 protocol encapsulation type supports synchronous and asynchronous circuits and has built-in security mechanisms?

• A. HDLC
• B. PPP
• C. X.25
• D. Frame Relay

Answer: B

Explanation: High-Level Data Link Control (HDLC) - HDLC is the default encapsulation type on point-to- point, dedicated links, and circuit-switched connections. It is used typically when communicating between two Cisco devices. It is a bit-oriented synchronous data link layer protocol.
Point-to-Point Protocol (PPP) - Provides router-to-router and host-to network connections over synchronous and asynchronous circuits. PPP was designed to work with several network layer protocols, such as IP, and IPX. PPP also has built in security mechanisms such as PAP and CHAP X.25/Link Access Procedure, Balanced (LAPB) - ITU-T standard that defines how connections between DTE and DCE are maintained for remote terminal access and computer communications in public data networks. X.25 specifies LAPB, a data line layer protocol. X.25 is a predecessor to Frame Relay.
Frame Relay - Industry standard, switched data link layer protocol that handles multiple virtual circuits. It is a next-generation to X.25 that is streamlined to eliminate some of the time-consuming processes (such as error correction and flow control) that were employed in X.25.

NEW QUESTION 10
Which term describes a spanning-tree network that has all switch ports in either the blocking or fowarding state?

• A. converged
• B. redundant
• C. provisioned
• D. spanned

Answer: A

Explanation: Spanning Tree Protocol convergence (Layer 2 convergence) happens when bridges and switches have transitioned to either the forwarding or blocking state. When layer 2 is converged, root bridge is elected and all port roles (Root, Designated and Non-Designated) in all switches are selected.

NEW QUESTION 11
Which commands are required to properly configure a router to run OSPF and to add network 192.168.16.0/24 to OSPF area 0? (Choose two.)

• A. Router(config)# router ospf 0
• B. Router(config)# router ospf 1
• C. Router(config)# router ospf area 0
• D. Router(config-router)# network 192.168.16.0 0.0.0.255 0
• E. Router(config-router)# network 192.168.16.0 0.0.0.255 area 0
• F. Router(config-router)# network 192.168.16.0 255.255.255.0 area 0

Answer: BE

Explanation: In the router ospf
Command, the ranges from 1 to 65535 so o is an invalid number - B is correct but A is not correct. To configure OSPF, we need a wildcard in the “network” statement, not a subnet mask. We also need to assign an area to this process - E is correct.

NEW QUESTION 12
Which type of EIGRP route entry describes a feasible successor?

• A. a backup route, stored in the routing table
• B. a primary route, stored in the routing table
• C. a backup route, stored in the topology table
• D. a primary route, stored in the topology table

Answer: C

Explanation: http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080093f07.shtml
Feasible Successors
A destination entry is moved from the topology table to the routing table when there is a feasible successor. All minimum cost paths to the destination form a set. From this set, the neighbors that have an advertised metric less than the current routing table metric are considered feasible successors.
Feasible successors are viewed by a router as neighbors that are downstream with respect to the destination.
These neighbors and the associated metrics are placed in the forwarding table.
When a neighbor changes the metric it has been advertising or a topology change occurs in the network, the set of feasible successors may have to be re-evaluated. However, this is not categorized as a route recomputation.
Feasible successor is a route whose Advertised Distance (AD) is less than the Feasible Distance (FD) of the current best path. A feasible successor is a backup route, which is not stored in the routing table but, stored in the topology table.

NEW QUESTION 13
What three pieces of information can be used in an extended access list to filter traffic? (Choose three)

• A. VLAN number
• B. TCP or UDP port numbers
• C. source switch port number
• D. source IP address and destination IP address
• E. protocol
• F. source MAC address and destination MAC address

Answer: BDE

NEW QUESTION 14
CORRECT TEXT
Which protocol authenticates connected devices before allowing them to access the LAN?

• A. 802.1d
• B. 802.11
• C. 802.1w
• D. 802.1x

Answer: D

Explanation: 802.1X authentication involves three parties: a supplicant, an authenticator, and an authentication server. The supplicant is a client device (such as a laptop) that wishes to attach to the LAN/WLAN. The term 'supplicant' is also used interchangeably to refer to the
software running on the client that provides credentials to the authenticator. The authenticator is a network device, such as an Ethernet switch or wireless access point; and the authentication server is typically a host running software supporting the RADIUS and EAP protocols.
The authenticator acts like a security guard to a protected network. The supplicant (i.e., client device) is not allowed access through the authenticator to the protected side of the network until the supplicant’s identity has been validated and authorized. An analogy to this is providing a valid visa at the airport's arrival immigration before being allowed to enter the country. With 802.1X port-based authentication, the supplicant provides credentials, such as user name/password or digital certificate, to the authenticator, and the authenticator forwards the credentials to the authentication server for verification. If the authentication server determines the credentials are valid, the supplicant (client device) is allowed to access resources located on the protected side of the network.

NEW QUESTION 15


R1 is configured with the default configuration of OSPF.
From the following list of IP addresses configured on R1, which address will the OSPF process select as the router ID?

• A. 192.168.0.1
• B. 172.16.1.1
• C. 172.16.2.1
• D. 172.16.2.225

Answer: A

Explanation: The Router ID (RID) is an IP address used to identify the router and is chosen using the following sequence:
+ The highest IP address assigned to a loopback (logical) interface.
+ If a loopback interface is not defined, the highest IP address of all active router’s physical interfaces will be chosen.
+ The router ID can be manually assigned
In this case, because a loopback interface is not configured so the highest active IP address 192.168.0.1 is chosen as the router ID.

NEW QUESTION 16
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: C

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 section Three 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 QUESTION 17
Which statement describes an EIGRP feasible successor route?

• A. A primary route, added to the routing table
• B. A backup route, added to the routing table
• C. A primary route, added to the topology table
• D. A backup route, added to the topology table

Answer: D

Explanation: Two terms that appear often in the EIGRP world are "successor" and "feasible successor". A successor is the route with the best metric to reach a destination. That route is stored in the routing table. A feasible successor is a backup path to reach that same destination that can be used immediately if the successor route fails. These backup routes are stored in the topology table.
Reference: http://study-ccna.com/eigrp-overview

NEW QUESTION 18
What are three characteristics of the OSPF routing protocol? (Choose three.)

• A. It converges quickly.
• B. OSPF is a classful routing protocol.
• C. It uses cost to determine the best route.
• D. It uses the DUAL algorithm to determine the best route.
• E. OSPF routers send the complete routing table to all directly attached routers.
• F. OSPF routers discover neighbors before exchanging routing information.

Answer: ACF

Explanation: Additional OSPF features include equal-cost, multipath routing, and routing based on upper-layer type-of-service (TOS) requests. TOS-based routing supports those upper-layer protocols that can specify particular types of service. An application, for example, might specify that certain data is urgent. If OSPF has high-priority links at its disposal, these can be used to transport the urgent datagram.
OSPF supports one or more metrics. If only one metric is used, it is considered to be arbitrary, and TOS is not supported. If more than one metric is used, TOS is optionally supported through the use of a separate metric (and, therefore, a separate routing table) for each of the eight combinations created by the three IP TOS bits (the delay, throughput,
and reliability bits). For example, if the IP TOS bits specify low delay, low throughput, and high reliability, OSPF calculates routes to all destinations based on this TOS designation. IP subnet masks are included with each advertised destination, enabling variable-length subnet masks. With variable-length subnet masks, an IP network can be broken into many subnets of various sizes. This provides network administrators with extra network- configuration flexibility.

NEW QUESTION 19
What does a router do if it has no EIGRP feasible successor route to a destination network and the successor route to that destination network is in active status?

• A. It routes all traffic that is addressed to the destination network to the interface indicated in the routing table.
• B. It sends a copy of its neighbor table to all adjacent routers.
• C. It sends a multicast query packet to all adjacent neighbors requesting available routing paths to the destination network.
• D. It broadcasts Hello packets to all routers in the network to re-establish neighbor adjacencies.

Answer: C

Explanation: Introduction to EIGRP Reference:
http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080093f07.shtml
Feasible Successors
A destination entry is moved from the topology table to the routing table when there is a feasible successor. All minimum cost paths to the destination form a set. From this set, the neighbors that have an advertised metric less than the current routing table metric are considered feasible successors.
Feasible successors are viewed by a router as neighbors that are downstream with respect to the destination.
These neighbors and the associated metrics are placed in the forwarding table.
When a neighbor changes the metric it has been advertising or a topology change occurs in the network, the set of feasible successors may have to be re-evaluated. However, this is not categorized as a route recomputation.
Route States
A topology table entry for a destination can have one of two states. A route is considered in the Passive state when a router is not performing a route recomputation. The route is in Active state when a router is undergoing a route recomputation. If there are always feasible successors, a route never has to go into Active state and avoids a route recomputation.
When there are no feasible successors, a route goes into Active state and a route recomputation occurs. A route recomputation commences with a router sending a query packet to all neighbors. Neighboring routers can either reply if they have feasible successors for the destination or optionally return a query indicating that they are performing a route recomputation. While in Active state, a router cannot change the next- hop neighbor it is using to forward packets. Once all replies are received for a given query, the destination can transition to Passive state and a new successor can be selected.
When a link to a neighbor that is the only feasible successor goes down, all routes through that neighbor commence a route recomputation and enter the Active state.

NEW QUESTION 20
Refer to the exhibit.

What is the meaning of the term dynamic as displayed in the output of the show frame- relay map command shown?

• A. The Serial0/0 interface is passing traffic.
• B. The DLCI 100 was dynamically allocated by the router
• C. The Serial0/0 interface acquired the IP address of 172.16.3.1 from a DHCP server
• D. The DLCI 100 will be dynamically changed as required to adapt to changes in the Frame Relay cloud
• E. The mapping between DLCI 100 and the end station IP address 172.16.3.1 was learned through Inverse ARP

Answer: E

Explanation: The term dynamic indicates that the DLCI number and the remote router IP address
172.16.3.1 are learned via the Inverse ARP process.
Inverse ARP is a technique by which dynamic mappings are constructed in a network, allowing a device such as a router to locate the logical network address and associate it with a permanent virtual circuit (PVC).