CCNA Test
A frame that enters a switch fails the Frame Check Sequence. Which two interface counters are incremented? (Choose two.) A)input error B)Frame C)giants D)CRC E)Runts
Cevap : A ile D
Whenever the physical transmission has problems, the receiving device might receive a frame whose bits have changed values. These frames do not pass the error detection logic as implemented in the FCS field in the Ethernet trailer. The receiving device discards the frame and counts it as some kind of input error. Cisco switches list this error as a CRC error. Cyclic redundancy check (CRC) is a term related to how the FCS math detects an error. The "input errors" includes runts, giants, no buffer, CRC, frame, overrun, and ignored counts. The output below show the interface counters with the "show interface s0/0/0" command:
Which command automatically generates an IPv6 address from a specified IPv6 prefix and MAC address of an interface? A) ipv6 address dhcp B)ipv6 address 2001:DB8:5:112::/64 eui-64 C)ipv6 address autoconfig D)ipv6 address 2001:DB8:5:112::2/64 link-local
Cevap C
The "ipv6 address autoconfig" command causes the device to perform IPv6 stateless address auto-configuration to discover prefixes on the link and then to add the EUI-64 based addresses to the interface. Addresses are configured depending on the prefixes received in Router Advertisement (RA) messages. The device will listen for RA messages which are transmitted periodically from the router (DHCP Server). This RA message allows a host to create a global IPv6 address from: "¢ Its interface identifier (EUI-64 address) "¢ Link Prefix (obtained via RA) Note: Global address is the combination of Link Prefix and EUI-64 address
Which 802.11 frame type is Association Response? A)Management B)Protected Frame C)Action D)Control
Cevap A. There are three main types of 802.11 frames: the Data Frame, the Management Frame and the Control Frame. Association Response belongs to Management Frame. Association response is sent in response to an association request. Reference: https://en.wikipedia.org/wiki/802.11_Frame_Types
When configuring IPv6 on an interface, which two IPv6 multicast groups are joined? (Choose two.) A) 2000::/3 B) 2002::5 C) FC00::/7 D) FF02::1 E) FF02::2
Cevap D ve E When an interface is configured with IPv6 address, it automatically joins the all nodes (FF02::1) and solicited-node (FF02::1:FFxx:xxxx) multicast groups. The all- node group is used to communicate with all interfaces on the local link, and the solicited-nodes multicast group is required for link-layer address resolution. Routers also join a third multicast group, the all-routers group (FF02::2). Reference: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipv6/configuration/xe-3s/ipv6-xe-36s-book/ip6-multicast.html
What is the default behavior of a Layer 2 switch when a frame with an unknown destination MAC address is received? A. The layer switch forwards the packet and adds the destination MAC address to its Mac address table B. The layer 2 switch sends a copy of a packet to CPU for destination MAC address learning C. The layer 2 switch floods packets to all ports except the receiving port in the given VLAN D. The layer 2 switch drops the received frame
Cevap C.
If the destination MAC address is not in the CAM table (unknown destination MAC address), the switch sends the frame out all other ports that are in the same VLAN as the received frame. This is called flooding. It does not flood the frame out the same port on which the frame was received.
Which IPv6 address type provides communication between subnets and cannot route on the Internet? A. link-local B. unique local C. multicast D. global unicast
Cevap B.
A IPv6 Unique Local Address is an IPv6 address in the block FC00::/7. It is the approximate IPv6 counterpart of the IPv4 private address. It is not routable on the global Internet. Note: In the past, Site-local addresses (FEC0::/10) are equivalent to private IP addresses in IPv4 but now they are deprecated. Link-local addresses only used for communications within the local subnet. It is usually created dynamically using a link-local prefix of FE80::/10 and a 64-bit interface identifier (based on 48-bit MAC address).
Which IPv6 address block sends packets to a group address rather than a single address? A. 2000::/3 B. FC00::/7 C. FE80::/10 D. FF00::/8
Cevap D FF00::/8 is used for IPv6 multicast and this is the IPv6 type of address the question wants to ask. FE80::/10 range is used for link-local addresses. Link-local addresses only used for communications within the local subnetwork (automatic address configuration, neighbor discovery, router discovery, and by many routing protocols). It is only valid on the current subnet. It is usually created dynamically using a link-local prefix of FE80::/10 and a 64-bit interface identifier (based on 48-bit MAC address).
Which IPv6 address block forwards packets to a multicast address rather than a unicast address? A. 2000::/3 B. FC00::/7 C. FE80::/10 D. FF00::/12
Cevap D
Which action must be taken to assign a global unicast IPv6 address on an interface that is derived from the MAC address of that interface? A. explicitly assign a link-local address B. disable the EUI-64 bit process C. enable SLAAC on a interface D. configure a stateful DHCPv6 server on the network
Cevap C
Which action is taken by switch port enabled for PoE power classification override? A. If a monitored port exceeds the maximum administrative value for power, the port is shutdown and err-disabled. B. When a powered device begins drawing power from a PoE switch port, a syslog message is generated. C. As power usage on a PoE switch port is checked, data flow to the connected device is temporarily paused. D. If a switch determines that a device is using less than the minimum configured power, it assumes the device has failed and disconnects it.
Cevap A
PoE monitoring and policing compares the power consumption on ports with the administrative maximum value (either a configured maximum value or the port's default value). If the power consumption on a monitored port exceeds the administrative maximum value, the following actions occur:
A syslog message is issued.
The monitored port is shut down and error-disabled.
The allocated power is freed. Reference: https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SX/configuration/guide/book/power_over_ethernet.pdf
What is the expected outcome when an EUI-64 address is generated? A. The interface ID is configured as a random 64-bit value B. The characters FE80 are inserted at the beginning of the MAC address of the interface C. The seventh bit of the original MAC address of the interface is inverted D. The MAC address of the interface is used as the interface ID without modification
Cevap C
Which type of IPv6 address is publicly routable in the same way as IPv4 public addresses? A. Multicast B. Unique local C. link-local D. Global unicast
Cevap D
What is a characteristic of spine-and-leaf architecture? A. Each link between leaf switches allows for higher bandwidth. B. It provides greater predictability on STP blocked ports. C. It provides variable latency. D. Each device is separated by the same number of hops.
Cevap D
A device detects two stations transmitting frames at the same time. This condition occurs after the first 64 bytes of the frame is received. Which interface counter increments? A.Runt B. Collision C. Late Collision D. CRC
Cevap C
Using direct sequence spread spectrum, which three 2.4-GHz channels are used to limit collisions? A. 5 6 7 B. 1 2 3 C. 1 6 11 D. 1 5 10
A wireless administrator has configured a WLAN; however, the clients need access to a less congested 5-GHz network for their voice quality. What action must be taken to meet the requirement? A. enable Band Select B. enable DTIM C. enable RX-SOP D. enable AAA override
Cevap A
Which component of an Ethernet frame is used to notify a host that traffic is coming? A. start of frame delimitter B. Type Field C. Preamble D.Data Field
Cevap C
Preamble is a 7 Byte field in the Ethernet frame which helps to receiver to know that it is an actual data (Ethernet Frame) and not some random noise in the transmission medium. It acts like a doorbell telling about the incoming data.
You are configuring your edge routers interface with a public IP address for Internet connectivity. The router needs to obtain the IP address from the service provider dynamically. Which command is needed on interface FastEthernet 0/0 to accomplish this? A.ip default-gateway B. ip route C. ip default-network D. ip address dhcp E. ip address dynamic
Cevap C
Which technique can you use to route IPv6 traffic over an IPv4 infrastructure? A. Nat B. 6 to 4 tunneling C. L2TPv3 D. dual-stack
Cevap B
What is the binary pattern of unique ipv6 unique local address? A.0000000 B.111111100 C.111111111 D.111111101
Cevap C A IPv6 Unique Local Address is an IPv6 address in the block FC00::/7, which means that IPv6 Unique Local addresses begin with 7 bits with exact binary pattern as 1111 110 -> Answer B is correct. Note: IPv6 Unique Local Address is the approximate IPv6 counterpart of the IPv4 private address. It is not routable on the global Internet.
Which two WAN architecture options help a business scalability and reliability for the network? (Choose two.) A.asychronous routing B. single-homed branches C. dual-homed branches D. static routing E.dynamic routing
Cevap C
Which WAN access technology is preferred for a small office / home office architecture? A.broadband cable access B. frame-relay packet switching C. dedicated point-to-point leased line D. Integrated Service Digital Network Switching
CevapA
How will Link Aggregation be implemented on a Cisco Wireless LAN Controller? A. The etherchannel must be configured in "mode active " B. When enabled, the WLC bandwith drops to 500 Mbps C. To pass client traffic, two or more ports must be configured D. One functional physical port is needed to pass client traffic
Cevap D
The SW1 interface g0/1 is in the down/down state. Which two configurations are valid reasons for the interface condition? (Choose two.) A. There is a protocol mismatch B. There is a dublex mismatch C. The interface is shut down D. The interface is error-disabled E. There is a speed mismatch
Cevap C ve D
A network engineer must create a diagram of a multivendor network. Which command must be configured on the Cisco devices so that the topology of the network can be mapped? A. Device(config)#lldp run B. Device(config)#cdp run C. Device(config-if)#cdp enable D. Device(config)#flow-sampler-map topology
Cevap A
Which QoS Profile is selected in the GUI when configuring a voice over WLAN deployment? A. Platinum B. Bronze C. Gold D. Silver
Cevap A Cisco Unified Wireless Network solution WLANs support four levels of QoS: Platinum/Voice, Gold/Video, Silver/Best Effort (default), and Bronze/Background
What is the primary effect of the spanning-tree portfast command? A. It immediately enables the port in the listening state. B. It immediately puts the port into the forwarding state when the switch is reloaded. C. It enables BPDU messages. D. It minimizes spanning-tree convergence time.
Cevap D
An engineer needs to configure LLDP to send the port description time length value (TLV). Which command sequence must be implemented? A. switch(config-if)#lldp port-description B. switch#lldp port-description C. switch(config-line)#lldp port-description D. switch(config)#lldp port-description
Cevap D
Which configuration ensures that the switch is always the root for VLAN 750? A. Switch(config)#spanning-tree vlan 750 priority 38418607 B. Switch(config)#spanning-tree vlan 750 priority 0 C. Switch(config)#spanning-tree vlan 750 root primary D. Switch(config)#spanning-tree vlan 750 priority 614440
Cevap C
Which unified access point mode continues to serve wireless clients after losing connectivity to the Cisco Wireless LAN Controller? A. Local B. Mesh C. Flexconnect D.Sniffer
Cevap C
In previous releases, whenever a FlexConnect access point disassociates from a controller, it moves to the standalone mode. The clients that are centrally switched are disassociated. However, the FlexConnect access point continues to serve locally switched clients. When the FlexConnect access point rejoins the controller (or a standby controller), all clients are disconnected and are authenticated again. This functionality has been enhanced and the connection between the clients and the FlexConnect access points are maintained intact and the clients experience seamless connectivity. When both the access point and the controller have the same configuration, the connection between the clients and APs is maintained.
Which command is used to specify the delay time in seconds for LLDP to initialize on any interface? A. lldp timer B. lldp tlv-select C. lldp reinit D. lldp holdtime
Cevap C
"¢ lldp holdtime seconds: Specify the amount of time a receiving device should hold the information from your device before discarding it "¢ lldp reinit delay: Specify the delay time in seconds for LLDP to initialize on an interface "¢ lldp timer rate: Set the sending frequency of LLDP updates in seconds
Which two values or settings must be entered when configuring a new WLAN in the Cisco Wireless LAN Controller GUI? (Choose two.) A. QoS settings B. Ip address of one or more access points C. SSID D. profile name E. management interface settings
Cevap C ve D
Which mode allows access points to be managed by Cisco Wireless LAN Controllers? A. Bridge B. Lightweight C. Mobility Express D. Autonomous
Cevap B A Lightweight Access Point (LAP) is an AP that is designed to be connected to a wireless LAN (WLAN) controller (WLC). APs are "lightweight," which means that they cannot act independently of a wireless LAN controller (WLC). The WLC manages the AP configurations and firmware. The APs are "zero touch" deployed, and individual configuration of APs is not necessary.
Which mode must be used to configure EtherChannel between two switches without using a negotiation protocol? A. Active B. On C. Auto D. Desirable
Cevap B
The Static Persistence (or "on" mode) bundles the links unconditionally and no negotiation protocol is used. In this mode, neither PAgP nor LACP packets are sent or received.
A Cisco IP phone receives untagged data traffic from an attached PC. Which action is taken by the phone? A. It drops the traffic. B. It allows the traffic to pass through unchanged. C. It tags the traffic with the native VLAN. D. It tags the traffic with the default VLAN.
Cevap B
Untagged traffic from the device attached to the Cisco IP Phone passes through the phone unchanged, regardless of the trust state of the access port on the phone.
Which two command sequences must be configured on a switch to establish a Layer 3 EtherChannel with an open-standard protocol? (Choose two.) A. interface GigabitEthernet0/0/1 channel-group 10 mode auto B. interface GigabitEthernet0/0/1 channel-group 10 mode on C. interface port-channel 10 no switchport ip address 172.16.0.1 255.255.255.0 D. interface GigabitEthernet0/0/1 channel-group 10 mode active E. interface port-channel 10 switchport switchport mode trunk
Cevap D ve E
Which command should you enter to configure an LLDP delay time of 5 seconds? A. lldp timer 5000 B. lldp holdtime 5 C. lldp reinit 5000 D. lldp reinit 5
Cevap D
✑ lldp holdtime seconds: Specify the amount of time a receiving device should hold the information from your device before discarding it lldp reinit delay: Specify the delay time in seconds for LLDP to initialize on an interface
✑ lldp timer rate: Set the sending frequency of LLDP updates in seconds
When configuring an EtherChannel bundle, which mode enables LACP only if a LACP device is detected? A.Passive B. Desirable C. On D. Auto E. Active
Cevap A
The LACP is Link Aggregation Control Protocol. LACP is an open protocol, published under the 802.3ad. The modes of LACP are active, passive or on. The side configured as "passive" will waiting the other side that should an Active for the Etherchannel to be established. PAgP is Port-Aggregation Protocol. It is Cisco proprietary protocol. The mode are On, Desirable or Auto. Desirable "" Auto will establish an EtherChannel. An example of how to configure an Etherchannel:
SwitchFormula1>enable - SwitchFormula1#configure terminal SwitchFormula1(config)# interface range f0/5 -14 SwitchFormula1(config-if-range)# channel-group 13 mode ? active Enable LACP unconditionally auto Enable PAgP only if a PAgP device is detected desirable Enable PAgP unconditionally on Enable Etherchannel only passive Enable LACP only if a LACP device is detected
After you deploy a new WLAN controller on your network, which two additional tasks should you consider? (Choose two.) A. Deploy a load balancer B. Configure additional vlans C. Configure multiple VRRP groups D. Deploy a POE switches E. Configure additional security policies
Cevap A ve E
Which two pieces of information about a Cisco device can Cisco Discovery Protocol communicate? (Choose two.) A. the native vlan B. the trunking vlan C. the vtp domain D. the spanning-tree priority E. the spanning-tree protocol
Cevap A ve C
Which two VLAN IDs indicate a default VLAN? (Choose two.) A. 0 B. 1 C. 1005 D. 1006
Cevap B ve C
VLAN 1 is a system default VLAN, you can use this VLAN but you cannot delete it. By default VLAN 1 is use for every port on the switch. Standard VLAN range from 1002-1005 it's Cisco default for FDDI and Token Ring. You cannot delete VLANs 1002-1005. Mostly we don't use VLAN in this range.
How does STP prevent forwarding loops at OSI Layer 2? A.TTL B. Mac address forwarding C. Collision Avoidance D. Port Blocking
Cevap D
Which two commands can you use to configure an actively negotiate EtherChannel? (Choose two.) A. channel-group 10 mode on B. channel-group 10 mode auto C. channel-group 10 mode passive D. channel-group 10 mode desirable E. channel-group 10 mode active
Cevap D ve E
Which technology is used to improve web traffic performance by proxy caching? A.WSA B. Firepower C. ASA D. FireSIGHT
Cevap A
What is a function of Wireless LAN Controller? A. register with a single access point that controls traffic between wired and wireless endpoints B. use SSIDs to distinguish between wireless clients C. send LWAPP packets to access points D. monitor activity on wireless and wired LANs
Cevap B
Which statement about LLDP is true? A. It is a Cisco proprietary protocol. B. It is configured in global configuration mode. C. The LLDP update frequency is a fixed value. D. It runs over the transport layer.
Cevap B
On a corporate network, hosts on the same VLAN can communicate with each other, but they are unable to communicate with hosts on different VLANs. What is needed to allow communication between the VLANs? A. a router with subinterfaces configured on the physical interface that is connected to the switch B. a router with an IP address on the physical interface connected to the switch C. a switch with an access link that is configured between the switches D. a switch with a trunk link that is configured between the switches
Cevap A
Different VLANs can't communicate with each other, they can communicate with the help of Layer3 router. Hence, it is needed to connect a router to a switch, then make the sub-interface on the router to connect to the switch, establishing Trunking links to achieve communications of devices which belong to different VLANs.
A.it sends traffic to Vlan 10 B. it sends the traffic to Vlan 100 C.It drops the traffic D. It sends the traffic to Vlan 1
Cevap B
A.The frame is proceeded in Vlan1 B. The frame is proceeded in Vlan 11 C. The frame is proceeded in Vlan 5 D. The frame is dropped
Cevap C
A. The phone and a workstation that is connected to the phone do not have VLAN connectivity. B. The phone sends and receives data in VLAN 50, but a workstation connected to the phone sends and receives data in VLAN 1. C. The phone sends and receives data in VLAN 50, but a workstation connected to the phone has no VLAN connectivity. D. The phone and a workstation that is connected to the phone send and receive data in VLAN 50.
Cevap C
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