CCNA 100-105 Study 2

Which destination addresses will be used by Host A to send data to Host C?

the IP address of Host C the MAC address of the router E0 interface

Router(config)#interface gigabitethernet 0/1 Router(config-if)#ip address 192.168.1.1 255.255.255.0 Router(config-if)#speed 100 Router

Router#show interface gig 0/1

After you configure the Loopback0 interface, which command can you enter to verify the status of the interface and determine whether fast switching is enabled?

Router#show ip interface loopback 0

Which command can you enter to re-enable Cisco Discovery Protocol on a local router after it has been disabled?

Router(config)# cdp run

Which six-byte field in a basic Ethernet frame must be an individual address?

SA

Which type of MAC address is aged out automatically by the switch?

dynamic

Which statement about vlan operation on Cisco catalyst switches is true?

Unknown unicast frames are retransmitted only to the ports that belong to the same vlan.

Which two VLANs are reserved for system use only?

0 4095

Refer to the exhibit. Which statement describes the effect of this configuration? Your Answer:

VLAN 10 is added to the VLAN database.

Which protocol allows VLANs to be dynamically configured between multiple switches?

VTP

Which MTU size can cause a baby giant error?

1518

What is the maximum size of an Ethernet frame that uses 802.1Q tagging?

1522 bytes

If three devices are plugged into one port on a switch and two devices are plugged into a different port, how many collision domains are on the switch?

2

Assuming the default switch configuration, which VLAN range can be added, modified and removed on a Cisco switch?

2 through 1001

If a router has four interfaces and each interface is connected to four switches, how many broadcast domains are present on the router?

4

A switch has 48 ports and 4 VLANs. How many collision and broadcast domains exist on the switch (collision, broadcast)?

48, 4

What is true about Ethernet?

802.3 Protocol CSMA/CD stops transmitting when congestion occurs

How does a Layer 2 switch differ from a hub?

: A switch tracks MAC addresses of directly-connected devices

View the topology and switching table shown in the exhibit. Host B sends a frame to Host C. What will the switch do with the frame?

: Send the frame out all ports except port 0/2.

Which two statements about late collisions are true?

: They may indicate a duplex mismatch. By definition, they occur after the 512th bit of the frame has been transmitted.

Why will a switch never learn a broadcast address?

A broadcast address will never be the source address of a frame

What are three benefits of implementing VLANs?

A higher level of network security can be reached by separating sensitive data traffic from other network traffic. A more efficient use of bandwidth can be achieved allowing many logical networks to use the same network infrastructure. Broadcast storms can be mitigated by increasing the number of broadcast domains, thus reducing their size.

On which type of device is every port in the same collision domain?

A hub

A workstation has just resolved a browser URL to the IP address of a server. Which protocol will the workstation now use to determine the destination MAC address to be placed into frames directed toward the sever?

ARP

If a host experiences intermittent issues that relate to congestion within a network while remaining connected, what could cause congestion on this LAN?

Broadcast storms

Which table displays the MAC Addresses that are learned on a switch?

CAM

On a Cisco switch, which protocol determines if an attached VoIP phone is from Cisco or from another vendor?

CDP

Which two protocols can detect Native VLAN mismatch errors? (

CDP STP

Which MAC protocol sets a random timer to reattempt communication?

CSMA/CD

hich feature allows a device to use a switch port that is configured for half-duplex to access the network?

CSMA/CD

When troubleshooting Ethernet connectivity issues, how can you verify that an IP address is known to a router?

Check whether the IP address is in the ARP table.

Which statement about native VLAN traffic is true?

Cisco Discovery Protocol traffic travels on the native VLAN by default.

Which feature builds a FIB and an adjacency table to expedite packet forwarding?

Cisco Express Forwarding

Which symptom most commonly indicates that two connecting interfaces are configured with a duplex mismatch?

Collisions on the interface.

Which network configuration can you use to segregate broadcast traffic for two different departments in your organization?

Configure a separate VLAN for each department.

If a router has 3 hosts connected in one port and two other hosts connected in another port, how may broadcast domains are present on the router?

Correct Answer: 2

Which statement about unicast frame forwarding on a switch is true?

Correct Answer: If the destination MAC address is unknown, the frame is flooded to every port that is configured in the same VLAN except on the port that it was received on.

Which switching method duplicates the first six bytes of a frame before making a switching decision?

Cut-through switching

At which layer of the OSI model does the protocol that provides the information that is displayed by the show cdp neighbors command operate?

Data link

What must be configured to establish a successful connection from Host A to switch SW-A through router RT-A?

Default gateway on SW-A

Which address type does a switch use to make selective forwarding decisions?

Destination MAC address

Which two pieces of information can be shared with LLDP TLVs?

Device management address Device type

Which feature facilitates the tagging of frames on a specific VLAN?

Encapsulation

The two connected ports on the switch are not turning orange or green. What would be the most effective steps to troubleshoot this physical layer problem?

Ensure that cables A and B are straight-through cables. Ensure that switch has power . Reseat all cables.

Which two statements about Ethernet standards are true?

Ethernet is defined by IEEE standard 802.3. When an Ethernet network uses CSMA/CD, it terminates transmission as soon as a collision occurs.

Drag-n-drop. Drag the cable type on the left to the purpose for which it is best suited on the right. (Not all options are used.)

Explanation: Straight-through/Crossover/Rollover 1. Use straight-through cables for the following connections: Switch to router Switch to PC or server Hub to PC or server Hub to Router 2. Use crossover cables for the following connections: Switch to switch Switch to hub Hub to hub Router to router PC to PC Router to PC 3. Use Rollover cable between a terminal (PC) and a console port (of a router or switch).

Which three options are fields in a basic Ethernet data frame?

Frame check sequence Type/length Preamble

Which method does a connected trunk port use to tag VLAN traffic?

IEEE 802.1Q

Which of the following is a characteristic of full-duplex communication?

It is point-to-point only.

Which two statements describe the operation of the CSMA/CD access method? (Choose two)

In a CSMA/CD collision domain, stations must wait until the media is not in use before 10/28/2018 How2Pass CCENT/ICND1 100-105 Online Practice Tests - (Test Engine v4.6.6) http://www.how2pass.com/emembers/icnd100/icnd1test/frame.php 23/38 transmitting. After a collision, all stations run a random backoff algorithm. When the backoff delay period has expired, all stations have equal priority to transmit data.

What is the function of the command "switchport trunk native vlan 999" on a Cisco Catalyst switch?

It designates VLAN 999 for untagged traffic

The exhibit (not yet available) shows MAC address table on a switch with MAC address 1111:1111:1111 mapped to port Fa0/1. Now when this switch receives a packet with destination MAC address as 1111:1111:1111 on port Fa0/1. How does the switch handle the frame?

It forwards the frame to port Fa0/1 only.

Which statement about LLDP is true?

It is configured in global configuration mode.

Which two of these are characteristics of the 802.1Q protocol?

It modifies the 802.3 frame header and thus requires that the FCS be recomputed. It is a trunking protocol capable of carrying untagged frames. Explanation

Which adverse situation can occur if an Ethernet cable is too long?

Late collisions

Which interface counter can you use to diagnose a duplex mismatch problem?

Late collisions

On which OSI layer does a VLAN operate?

Layer 2

Which two types of information are held in the MAC address table?

MAC address Port numbers

Which three statements accurately describe layer 2 Ethernet switches?

Microhave only one root port. Establishing vlans increases the number of broadcast domains. segmentation decreases the number of collisions on the network. In a properly functioning network with redundant switched paths, each switched segment will contain one root bridge with all its ports in the forwarding state. All other switches in that broadcast domain will

What is the first 24 bits in a MAC address called?

OUI

How many broadcast domains are shown in the graphic assuming only the default VLAN is configured on the switches?

One

Which fields are contained in a layer 2 Ethernet frame?

Preamble Type/length Frame Check Sequence

View the exhibit. If CDP is enabled on all devices and interfaces, which devices will appear in the output of a show cdp neighbors command issued from R2?

R3 and S2

Refer to the exhibit. The network administrator cannot connect to Switch1 over a Telnet session, although the hosts attached to Switch1 can ping the interface Fa0/0 of the router. Given the information in the graphic and assuming that the router and Switch2 are configured properly, which of the following commands should be issued on Switch1 to correct this problem?

SW1(config)# ip default-gateway 192.168.24.1

Which three options are switchport configurations that can always avoid duplex mismatch error between the switches? (Choose three.)

Set both sides to autonegotiation. Set both sides to half-duplex. Set one side to autonegotiation and the other side to half-duplex.

Drag-n-drop. PC_1 is exchanging packets with the FTP server. Consider the packets as they leave RouterB interface Fa0/1 towards RouterA. Drag the correct frame and packet address to their place in the table.

Source MAC: 000.0c89.3333 Source IP: 172.16.34.250 Destination MAC: 0000.0c93.9999 Destination IP: 172.16.21.7

Drag-n-drop. PC_1 is sending packets to the FTP server. Consider the packets as they leave RouterA interface Fa0/0 towards RouterB. Drag the correct frame and packet address to their place in the table.

Source MAC: 0000.0c93.9999 Source IP: 172.16.21.7 Destination MAC: 000.0c89.3333 Destination IP: 172.16.34.250

Which command can you enter to view the ports that are assigned to VLAN 20?

Switch#show vlan id 20

Which command sequence can you enter to create VLAN 20 and assign it to an interface on a switch?

Switch(config)#vlan 20 Switch(config)#Interface gig x/y Switch(config-if)#switchport access vlan 20

What command can you enter to assign an interface to the default VLAN?

Switch(config-if)#switchport access vlan 1

View the exhibit. A technician has installed SwitchB and needs to configure it for remote access from the management workstation connected to SwitchA. Which set of commands is required to accomplish this task?

SwitchB(config)#ip default-gateway 192.168.8.254 SwitchB(config)#interface vlan 1 SwitchB(config-if)#ip address 192.168.8.252 255.255.255.0 SwitchB(config-if)#no shutdown

Which option is a valid hostname for a switch?

SwitchCisc0

View the exhibit. The MAC address table is shown in its entirety. The Ethernet frame that is shown arrives at the switch. What two operations will the switch perform when it receives this frame? (Choose two)

The MAC address of 0000.00aa.aaaa will be added to the MAC Address Table. The frame will be forwarded out of all active switch ports except for port fa0/0.

View the exhibit. The network administrator is testing connectivity from the branch router to the newly installed application server. What is the most likely reason for the first ping having a success rate of only 60 percent?

The branch router had to resolve the application server MAC address

The internetwork displayed in the exhibit is experiencing network connectivity problems. Which is the most likely cause of this problem?

The cable connecting SW2 and SW3 should be a crossover.

VLAN 3 is not yet configured on your switch. What happens if you set the switchport access vlan 3 command in interface configuration mode?

The command is accepted and the respective VLAN is added to vlan.dat.

Configuration of which option is required on a Cisco switch for the Cisco IP phone to work?

The interface as an access port to allow the voice VLAN ID.

What are two reasons that duplex mismatches can be difficult to diagnose?

The interface displays a connected (up/up) state even when the duplex settings are mismatched. The symptoms of a duplex mismatch may be intermittent.

View the exhibit. All switch ports are assigned to the correct VLANs, but none of the hosts connected to SwitchA can communicate with hosts in the same VLAN connected to SwitchB. Based on the output shown, what is the most likely problem

The link between the switches needs to be configured as a trunk.

View the exhibit. The network administrator normally establishes a Telnet session with the switch from host A. However, host A is unavailable. His attempt to telnet to the switch from host B fails, but pings to the other two hosts are successful. What is the issue?

The switch needs an appropriate default gateway assigned.

Two hosts are attached to a switch with the default configuration. Which statement about the configuration is true?

The two hosts are in the same broadcast domain.

Which three statements are true about the operation of a full-duplex Ethernet network? (Select three)

There are no collisions in full-duplex mode. A dedicated switch port is required for each full-duplex node. The host network card and the switch port must be capable of operating in full-duplex mode

hich of the following are benefits of VLANs?

They allow logical grouping of users by function. They can enhance network security. They increase the number of broadcast domains while decreasing the size of the broadcast

What are three advantages of VLANs? (

They establish broadcast domains in switched networks. They can simplify adding, moving, or changing hosts on the network. They allow access to network services based on department, not physical location.

A network interface port has collision detection and carrier sensing enabled on a shared twisted pair network. From this statement, what is known about the network interface port?

This is an Ethernet port operating at half duplex.

What is used to allow multiple VLANs between switches without using L3 device?

Trunk

On which type of port can switches interconnect for multi-VLAN communication?

Trunk port

In an Ethernet network, under what two scenarios can devices transmit?

When they detect no other devices are sending. When the medium is idle.

) If a switch received a frame while forwarding others, how the frame would be handled?

Will be forwarded at the same time with the current frame

Which two options will help to solve the problem of a network that is suffering a broadcast storm? (Choose two)

a router a Layer 3 switch

Which command would you configure globally on a Cisco router that would allow you to view directly connected Cisco devices?

cdp run

Which command can you enter to determine whether a switch is operating in trunking mode?

show interface switchport

Which two commands can be used to verify a trunk link configurationt status on a given cisco switch? (choose two)

show interfaces interface trunk show interfaces interface switchport

If host Z needs to send data through router R1 to a storage server, which destination MAC address does host Z use to transmit packets?

the MAC address of the interface on R1 that connects to host Z.

For what two purposes does the Ethernet protocol use physical addresses?

to uniquely identify devices at Layer 2 to allow communication between different devices on the same network