Cisco Certified Network Associate 200-301 CCNA Exam Questions and Answers – Page 3

The latest Cisco Certified Network Associate 200-301 CCNA certification actual real practice exam question and answer (Q&A) dumps are available free, which are helpful for you to pass the Cisco Certified Network Associate 200-301 CCNA exam and earn Cisco Certified Network Associate 200-301 CCNA certification.

Exam Question 251

The following is a partial output of the show interfaces command:

What does the Serial 0 is up, line protocol is down statement signify in the output? (Choose all that apply.)

A. the shutdown interface command is present in the router configuration
B. a cable is unplugged
C. the interface is displaying normal operation
D. there are no problems with physical connectivity
E. there is a configuration problem in the local or remote router

Correct Answer:
D. there are no problems with physical connectivity
E. there is a configuration problem in the local or remote router
Answer Description:
The Serial 0 is up, line protocol is down statement in the output signifies the following:

• There are no problems with the physical connectivity.
• There is a configuration problem in the local or remote router.
• The remote router might not be sending the keep-alives.
• There may be a problem with the leased lines such as line noise and a malfunctioning switch.
• There is an incorrect configuration of the CSU/DSU, which can cause timing issues on the cable.
• The local or remote CSU/DSU might have failed.

The option stating that the shutdown interface command is present in the router configuration is incorrect because if the shutdown interface command is present in the router configuration, the message displayed would be Serial 0 is administratively down, line protocol is down.
The option stating that a cable is unplugged is incorrect because that would be indicated by Serial 0 is down, line protocol is down. Physical problems such as a bad cable or cable unplugged are addressed in the first part of the output (serial0 is up/down).
The option stating that the message refers to normal operation of the interface is incorrect because the line protocol is shown as down, which indicates a problem.
Objective: Routing Fundamentals
Sub-Objective: Troubleshoot basic Layer 3 end-to-end connectivity issues

Exam Question 252

Which command would you use to see which interfaces are currently operating as trunks?

A. show interface switchports
B. show trunk interface
C. show interfaces trunk
D. show switchport trunk

Correct Answer:
C. show interfaces trunk
Answer Description:
The show interfaces trunk command displays a list of interfaces currently operating as trunks, and their configuration (such as supported VLANs or frame tagging method). Sample output would resemble the following:
Switch# show interfaces trunk
Port Mode Encapsulation Status Native vlan
Gi0/1 desirable 802.1q trunking 1
Gi0/2 desirable 802.1q trunking 1
Port Vlans allowed on trunk
Gi0/1 1-4094
Gi0/2 1-4094
<Output omitted>
This output indicates that switch ports Gi0/1 and Gi0/2 are both currently operating as trunks (Status), and that 802.1q frame tagging is being used on the trunk links.
The remaining options are incorrect because they are not valid Cisco IOS commands.
Objective: Infrastructure Management
Sub-Objective: Use Cisco IOS tools to troubleshoot and resolve problems

Exam Question 253

Which Cisco Internetwork Operating System (IOS) command is used to view information about Open Shortest Path First (OSPF) routing processes?

A. show ip ospf database
B. show ip ospf statistics
C. show ip ospf
D. show ip ospf traffic

Correct Answer:
C. show ip ospf
Answer Description:
The show ip ospf command is used to view information about the OSPF routing processes. It does so by displaying the collection of link states present in the database. The syntax of the command is as follows:
Router# show ip ospf [process-id]
The process-id parameter of the command specifies the process ID. The output of the command is as follows:

The show ip ospf database command is incorrect because this command is used to view the OSPF database for a specific router.
The show ip ospf statistics command is incorrect because this command is no longer valid in IOS version 12.4.
The show ip ospf traffic command is incorrect because this command is no longer valid in IOS version 12.4.
Objective: Routing Fundamentals
Sub-Objective: Configure, verify, and troubleshoot single area and multi-area OSPFv2 for IPv4 (excluding authentication, filtering, manual summarization, redistribution, stub, virtual-link, and LSAs)

Exam Question 254

What is the term used for the Ethernet communication mechanism by which hosts can send and receive data simultaneously?

A. full-duplex
B. multiplex
C. half-duplex
D. duplex

Correct Answer:
A. full-duplex
Answer Description:
Full-duplex communication occurs when workstations can send and receive data simultaneously. To support full-duplex communication, both communicating hosts should be configured to transmit in fullduplex mode. With the use of full-duplex communication, the bandwidth can effectively be doubled. Hubs are not capable of handling full-duplex communication, and you need a dedicated switch port to allow fullduplex communication.
Half-duplex is the term used for the Ethernet communication mechanism when hosts can send or receive data, but not simultaneously.
It is important that the switch and the device connected to the switch have the same duplex and speed settings, or there will intermittent connectivity and loss of connection. To verify the duplex and speed settings on a switch, execute the show interfaces command, specifying the interface and the setting can be verified (as shown in line 8 in the output below):
switch# show interface fastethernet 0/3
Fast Ethernet 0/3 is down, line protocol is down (not connect)
Hardware is Fast Ethernet, address is 00e0.1e3e.2a02
MTU 1500 bytes, BW 10000 Kbit, DLY 100 usec, rely 1/255, tx load
1/255, rxload 1/255
Encapsulation ARPA, loopback not set,
Keepalive set (10 sec)
Half-duplex, 100Mb/s
ARP type: ARPA, ARP Timeout 04:00:00
From the output above it can be seen that the switch interface is set for half duplex and the speed is set for 100Mb/s. This means that if the host connected to this switch port is set differently, for example set to 1 Gb/s because it has a 1 Gb NIC, the host and the switch interface will not communicate and the host will not be able to connect to the network.
Multiplex is the term used when multiple signals are combined to be transferred via one signal.
Duplex implies that there are two communication paths. However, the term does not specify the required functionality, which is full duplex.
Objective: LAN Switching Fundamentals
Sub-Objective: Describe and verify switching concepts

Exam Question 255

Which two statements are TRUE of default routes? (Choose two.)

A. Default routes are used for routing packets destined only for networks that are listed in the routing table.
B. Default routes are used for routing packets destined for networks that are not listed in the routing table.
C. Default routes should not be used in a stub network.
D. Default routes are ideal for use in stub networks.
E. Network security is increased by using default routes.

Correct Answer:
B. Default routes are used for routing packets destined for networks that are not listed in the routing table.
D. Default routes are ideal for use in stub networks.
Answer Description:
Default routes are to route packets that are destined for networks not listed in the routing table. Also, default routes are ideal for use in stub networks. Stub networks are those that have only one adjacent router interface and therefore only one interface to send any packet, regardless of destination. When used in this fashion the default route will be the only route in the routing table.
The following statements are also true of default routes:

• A default route is also known as the gateway of last resort.
• The default route in Internet Protocol Version 4 (IPv4) is represented as 0.0.0.0/0.

The option stating that default routes are used to route packets destined only for networks that are listed in the routing table is incorrect. Default routes are used for routing packets that are destined for networks not listed in the routing table.
The option stating that default routes should not be used in a stub network is incorrect. Default routes are helpful in topologies where it is not necessary to learn specific networks, making them ideal for use in a stub network.
The option stating that network security is increased by using default routes is incorrect. Default routes are not concerned with enhancing network security.
Objective: Routing Fundamentals
Sub-Objective: Describe the routing concepts

Exam Question 256

The following shows the partial output of the show cdp neighbors command:
DevicID Local Intrfce Holdtme Capability Platform Port ID
lab-7206 Eth 0 157 R 7206VXR Fas 0/0/0
lab-as5300-1 Eth 0 163 R AS5300 Fas 0
lab-as5300-2 Eth 0 159 R AS5300 Eth 0
lab-as5300-3 Eth 0 122 R AS5300 Eth 0
lab-as5300-4 Eth 0 132 R AS5300 Fas 0/0
lab-3621 Eth 0 140 R S 3631-telcoFas 0/0
008024 2758E0 Eth 0 132 T CAT3000 1/2
lab-400-1 Eth 0 130 r FH400 Fas 0/0
What does “r” represent in this output?

A. Router
B. Route bridge
C. Hub
D. Repeater

Correct Answer:
D. Repeater
Answer Description:
The “r” in the output of the show cdp neighbors command is a capability code that represents a repeater. The capability codes from the output of the show cdp neighbors command along with their descriptions are:
Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge S - Switch, H - Host, I - IGMP, r - Repeater
The show cdp neighbors command is used to view details about neighboring devices discovered by Cisco Discovery Protocol (CDP). The following code is the full output of the command:
Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
S - Switch, H - Host, I - IGMP, r - Repeater
DevicID Local Intrfce Holdtme Capability Platform Port ID
lab-7206 Eth 0 157 R 7206VXR Fas 0/0/0
lab-as5300-1 Eth 0 163 R AS5300 Fas 0
lab-as5300-2 Eth 0 159 R AS5300 Eth 0
lab-as5300-3 Eth 0 122 R AS5300 Eth 0
lab-as5300-4 Eth 0 132 R AS5300 Fas 0/0
lab-3621 Eth 0 140 R S 3631-telcoFas 0/0
008024 2758E0 Eth 0 132 T CAT3000 1/2
lab-400-1 Eth 0 130 r FH400 Fas 0/0
The fields in the output are as follows:

• Device ID: The ID, Media Access Control (MAC) address or the serial number of the neighboring device.
• Local Intrfce: The protocol which the connectivity media uses.
• Holdtme: The time duration for which the CDP advertisement will be held back by the current device from a transmitting router before it gets discarded.
• Capability: The type of device discovered by the CDP. It can have the following values:
• R Router
• T Transparent bridge
• B Source-routing bridge
• S Switch
• H Host
• I IGMP device
• r Repeater
• Platform: The product number of the device.
• Port ID: The protocol and port number of the device.

The “r” in the output does not represent a router. A router would be represented by a capital “R.”
The “r” in the output does not represent a route bridge. A source route bridge would be represented by a capital “B.”
The “r” in the output does not represent a hub. The show cdp neighbors command does not include a capability code for this device.
Objective: LAN Switching Fundamentals
Sub-Objective: Configure and verify Layer 2 protocols

Exam Question 257

Which of the following splits the network into separate broadcast domains?

A. bridges
B. VLANs
C. switches
D. hubs

Correct Answer:
B. VLANs
Answer Description:
Virtual LANs (VLANs) split the network into separate broadcast domains, as would a router. VLANs are a software implementation embedded in a switch’s software that allows the switch’s hardware to switch packets only to ports that belong to the same VLAN.
Neither a switch nor a bridge splits the network into separate broadcast domains. Both a switch and a bridge are used to create collision domains for each connected node. Collision domains confine traffic destined to or coming from a particular host to the switch port of that node in the switch. This reduces collisions, which in turn decreases retransmissions and elevates throughput. Switches work at Layer 2 in the OSI model and perform the function of separating collision domains. Neither switches nor bridges filter broadcasts and distribute them across all ports.
A hub does not split the network into separate broadcast domains. A hub regenerates signal when it passes through its ports, which means that it acts as a repeater and port concentrator only. Hubs and repeaters are Layer 1 devices that can be used to enlarge the area covered by a single LAN segment, but cannot be used to segment the LAN as they have no intelligence with regards to either MAC addresses or IP addresses. Hubs provide a common connection point for network devices, and connect different network segments. Hubs are generally used for LAN segmentation. Hubs work at Layer 1 of the OSI model, which is the physical layer. Hubs do not filter broadcasts or create collision domains.
Objective: Network Fundamentals
Sub-Objective: Describe the impact of infrastructure components in an enterprise network

Exam Question 258

You have executed the following commands on a switch:
Switch64(config)# interface range gigabitethernet2/0/1 -2
Switch64(config-if-range)# switchport mode access
Switch64(config-if-range)# switchport access vlan 10
Switch64(config-if-range)# channel-group 5 mode auto
In which of the following situations will Switch64 create an Etherchannel?

A. If the other switch is set for desirable mode
B. If the other switch is set for auto mode
C. If the other switch is set for on mode
D. If the other switch is set for passive mode

Correct Answer:
A. If the other switch is set for desirable mode
Answer Description:
The Etherchannel will be created if the other end is set to desirable mode. The configuration shown in the example is using Port Aggregation protocol (PAGP). This protocol has two settings: desirable and auto. Two ends will negotiate and will only create an Etherchannel under two conditions: if one end is set to auto and the other end is set to desirable, or if both ends are set for desirable.
It will not form an Etherchannel if the other end is set to auto mode. When both ends are set to auto mode, an Etherchannel will not form.
It will not form an Etherchannel if the other end is set to on mode. On mode disables negotiation of any kind, which will prevent an Etherchannel from forming unless the other end is also set for on.
It will not form an Etherchannel if the other end is set to passive mode. Passive is a setting used in Link Aggregation Protocol (LACP). The two protocols are not compatible.
Objective: LAN Switching Fundamentals
Sub-Objective: Configure, verify, and troubleshoot (Layer 2/Layer 3) EtherChannel

Exam Question 259

Which Network Address Translation (NAT) term is used for the IP address that is assigned to a host on the inside network?

A. Inside local address
B. Inside global address
C. Outside local address
D. Outside global address

Correct Answer:
A. Inside local address
Answer Description:
An inside local address is the NAT term that is used to describe the IP address assigned to a host on the inside network. It is usually a private IP address.
An inside global address is the registered IP address assigned by the ISP, which represents one or more inside local IP addresses externally.
An outside local address is the IP address of an external host as it appears to the internal network.
An outside global address is the IP address assigned to a host on the external network by the host owner. The address is allocated from a globally routable address space.
NAT enables companies to use one IP addressing scheme within their network but translate those IP addresses for external communication. Static NAT assigns a permanent one-to-one mapping of local addresses to global addresses. Dynamic NAT assigns address mappings by using a pool of available addresses. NAT overloading or Port Address Translation (PAT) reduces the number of global addresses required by allowing multiple local hosts to share a global address.
Objective: Infrastructure Services
Sub-Objective: Configure, verify, and troubleshoot inside source NAT

Exam Question 260

The workstation at 10.0.1.3 sends a packet to the workstation at 10.1.1.3.

When the packet leaves the R2 router, what addresses will be located in the header? (Choose two.)

A. Source MAC bb.bb.bb.bb.bb.bb Dest MAC ab.ab.ab.ab.ab.ab
B. Source MAC dd.dd.dd.dd.dd.dd Dest MAC ab.ab.ab.ab.ab.ab
C. Source MAC ee.ee.ee.ee.ee.ee Dest MAC ab.ab.ab.ab.ab.ab
D. Source IP 10.0.1.3 Dest IP 10.1.1.3
E. Source IP 10.0.1.1 Dest IP 10.1.1.2
F. Source IP 10.0.1.2 Dest IP 10.1.1.3
G. Source IP 10.0.1.1 Dest IP 10.1.1.3

Correct Answer:
B. Source MAC dd.dd.dd.dd.dd.dd Dest MAC ab.ab.ab.ab.ab.ab
D. Source IP 10.0.1.3 Dest IP 10.1.1.3
Answer Description:
When the packet leaves the R2 router, the addresses that will be located in the header are:
Source MAC dd.dd.dd.dd.dd.dd
Dest MAC ab.ab.ab.ab.ab.ab
Source IP 10.0.1.3
Dest IP 10.1.1.3
If we executed the ipconfig/all command on the computer located at 10.1.1.3/24, it would look somewhat like what is shown below. The router interface (10.1.1.1/24) would use an ARP broadcast to determine the MAC address associated with the IP address 10.1.1.3/24 and it would be returned as ab.ab.ab.ab.ab. The router interface would then encapsulate the packet in a frame addressed to ab.ab.ab.ab.ab.

The source and destination IP address never change as the packet is routed across the network. The MAC address will change each time a router sends the packet to the next router or to the ultimate destination. The switches do not change either set of addresses in the header; they just switch the frame to the correct switch port according to the MAC address table. Therefore, when the packet leaves R2, the source MAC address will be that of R2, and the destination will be that of the workstation at 10.1.1.3. The IP addresses will be those of the two workstations, 10.0.1.3 and 10.1.1.3.
When the workstation at 10.0.1.3 starts the process, it will first determine that the destination address is in another subnet, and will send the packet to its default gateway at 10.0.1.2. It will perform an ARP broadcast for the MAC address that goes with 10.0.1.2, and R1 will respond with its MAC address, bb.bb.bb.bb.bb.bb.
After R2 determines the next-hop address to send to 10.0.1.3 by parsing the routing table, it will send the packet to R1 at 10.0.6.2. When R2 receives the packet, R2 will determine that the network 10.0.1.0/24 is directly connected and will perform an ARP broadcast for the MAC address that goes with 10.0.1.3. The workstation at 10.0.1.3 will respond with its MAC address, ab.ab.ab.ab.ab.ab.
Objective: Routing Fundamentals
Sub-Objective: Describe the routing concepts