CCNA Images
Refer to the exhibit, you determine that Computer A cannot ping Computer B. Which reason for the problem is most likely true? A. The Subnet mask for Computer A is incorrect B. The default gateway address for Computer A is incorrect C. The subnet mask for computer B is incorrect. D. The default gateway address for computer B is incorrect
Answer: A
Refer to the exhibit. After you apply the give configurations to R1 and R2 you notice that OSPFv3 fails to start. Which reason for the problem is most likely true? A. The area numbers on R1 and R2 are mismatched B. The IPv6 network addresses on R1 and R2 are mismatched C. The autonomous system numbers on R1 and R2 are mismatched D. The router ids on R1 and R2 are mismatched
Answer: A
Refer to the exhibit. How will switch SW2 handle traffic from VLAN 10 on SW1? A. It sends the traffic to VLAN 100 B. It sends the traffic to VLAN 1 C. It drops the traffic D. It sends the traffic to VLAN 10
Answer: A
Refer to the exhibit. If R1 receives a packet destined to 172.16.1.1, to which IP address does it send the packet? A. 192.168.14.4 B. 192.168.12.2 C. 192.168.13.3 D. 192.168.15.5
Answer: A
Refer to the exhibit. If R1 sends traffic to 192.168.10.45 the traffic is sent through which interface? A. FastEthernet0/1 B. FastEthernet0/0 C. FastEthernet1/0 D. FastEthernet1/1
Answer: A
The network administrator normally establishes a Telnet session with the switch from host A. The administrator's attempt to establish a connect via Telnet to the switch from host B fails, but pings from host B to other two hosts are successful. What is the issue for this problem? A. Host B and the switch need to be in the same subnet. B. The switch needs an appropriate default gateway assigned. C. The switch interface connected to the router is down. D. Host B need to be assigned an IP address in vlan 1.
Answer: B
Which value is included in the initial TCP syn message? A. a session ID B. sequence number C. a TTL number D. an acknowledgment number
Answer: B
Refer to the exhibit. Switch-1 needs to send data to a host with a MAC address of 00b0.d056.efa4. What will Switch-1 do with this data? A. Switch-1 will drop the data because it does not have an entry for that MAC address. B. Switch-1 will forward the data to its default gateway. C. Switch-1 will flood the data out all of its ports except the port from which the data originated. D. Switch-1 will send an ARP request out all its ports except the port from which the data originated.
Answer: C
Refer to the exhibit. At the end of an RSTP election process, which access layer switch port will assume the discarding role? A. Switch3, port fa0/1 B. Switch3, port fa0/12 C. Switch4, port fa0/11 D. Switch4, port fa0/2 E. Switch3, port Gi0/1
Answer: C
Refer to the exhibit. Give this output for SwitchC, what should the network administrator's next action be? A. Check the trunk encapsulation mode for SwitchC's fa0/1 port. B. Check the duplex mode for SwitchC's fa0/1 port. C. Check the duplex mode for SwitchA's fa0/2 port. D. Check the trunk encapsulation mode for SwitchA's fa0/2 port.
Answer: C
Refer to the exhibit. Given the output shown from this Cisco Catalyst 2950, what is the most likely reason that interface FastEthernet 0/10 is not the root port for VLAN 2? Switch# show spanning-tree interface fastethernet0/10 A. This switch has more than one interface connected to the root network segment in VLAN 2. B. This switch is running RSTP while the elected designated switch is running 802.1d Spanning Tree. C. This switch interface has a higher path cost to the root bridge than another in the topology. D. This switch has a lower bridge ID for VLAN 2 than the elected designated switch.
Answer: C
Refer to the exhibit. What is the cause of the Syslog output messages? A. The EIGRP neighbor on Fa0/1 went down due to a failed link. B. The EIGRP neighbor connected to Fa0/1 is participating in a different EIGRP process, causing the adjacency to go down. C. A shut command was executed on interface Fa0/1, causing the EIGRP adjacency to go down. D. Interface Fa0/1 has become error disabled, causing the EIGRP adjacency to go down.
Answer: C
Refer to the exhibit. Which statement about the interface that generated the output is true? A. Five secure MAC addresses are dynamically learned on the interface B. A syslog message is generated when a violation occurs C. One secure MAC address is manually configured on the interface D. One secure MAC address is dynamically configured on the interface
Answer: C
Refer to the exhibit. Which switch provides the spanning-tree designated port role for the network segment that services the printers? A. Switch1 B. Switch2 C. Switch3 D. Switch4
Answer: C
Refer to the exhibit: Which two statements are true of the interfaces on Switch1? (Choose two) A. Interface FastEthernet0/2 has been disabled. B. Multiple devices are connected directly to FastEthernet0/1. C. FastEthernet0/1 is configured as a trunk link. D. FastEthernet0/1 is connected to a host with multiple network interface cards E. FastEthernet0/5 has statically assigned MAC addresses. F. A hub is connected directly to FastEthernet0/5
Answer: C F
R1 is unable to establish an OSPF neighbor relationship with R3. What are possible reasons for this problem? (Choose two) A. All of the routers need to be configured for backbone Area 1. B. R1 and R2 are the DR and BDR, so OSPF will not establish neighbor adjacency with R3. C. A static route has been configured from R1 to R3 and prevents the neighbor adjacency from being established. D. The hello and dead interval timers are not set to the same values on R1 and R3. E. EIGRP is also configured on these routers with a lower administrative distance. F. R1 and R3 are configured in different areas.
Answer: D F
Refer to the exhibit: Which two statements are true about interVLAN routing in the topology that is shown in the exhibit? (Choose two) A. Host E and host F use the same IP gateway address. B. Routed and Switch2 should be connected via a crossover cable. C. Router1 will not play a role in communications between host A and host D. D. The FastEthernet 0/0 interface on Router1 must be configured with subinterfaces. E. Router1 needs more LAN interfaces to accommodate the VLANs that are shown in the exhibit. F. The FastEthernet 0/0 interface on Router1 and Switch2 trunk ports must be configured using the same encapsulation type.
Answer: D F
Two routers named Atlanta and Brevard are connected by their serial interfaces as illustrated, but there is no connectivity between them. The Atlanta router is known to have a correct configuration. Given the partial configurations, identify the problem on the Brevard router that is causing the lack of connectivity. A. transmission unit size too large B. no loopback set C. an incorrect subnet mask D. incompatible encapsulation at each end E. an incorrect IP address F. incompatible bandwidth between routers
Answer: E
Drag and drop the DHCP client states from the left into the standard order in which the client passes through them on the right.
Answer: initializing - first selecting - second requesting - third bound (binding) - fourth renewing - fifth rebinding - sixth
Drag each route source from the left to the numbers on the right. Beginning with the lowest and ending with the highest administrative distance.
Answer: 1: connected (AD = 0) 2: static (AD = 1) 3: EBGP (AD = 20) 4: EIGRP (AD = 90) 5 :OSPF (AD = 110) 6: RIP (AD = 120)
How many broadcast domains are shown in the graphic assuming only the default VLAN is configured on the switches? A. one B. six C. twelve D. two
Answer: A
Drag each WAN access connectivity option on the left to the matching design goal on the right.
Answer: + Enable mobile devices to connect to an enterprise network: client VPN + Use the logical full-mesh network of a service provider across an enterprise headquarters and remote sites: MPLS + Securely connect two networks over an untrusted network: site-to-site VPN + Use GRE tunnels and IPSec to create a full-mesh network through a central location: DMVPN
Drag and drop the Ethernet terms from the left onto the correct descriptions on the right.
Answer: + calculated value that can increase when a new station is added to a network: collision rate + ability of an end device to determine that another device is communicating on a share link: collision detection + link used to transport data between a source and a destination: medium + potential conflict when more than one end device attempts to send traffic over the same link: collision + use of CSMA to ensure that devices on shared link can communicate without interfering with one another: carrier sense ===========
Drag and drop the STP features from the left onto the correct descriptions on the right.
Answer: + data message that STP uses to prevent loops: BPDU + disables the sending and receiving of BPDUs: BPDU filter + enables a port to immediately transition to the forwarding state: PortFast + prevents a port from entering the blocking state: Root guard + prevents a port from receiving BPDUs: BPDU guard Explanation If a BPDU is received on a port where BPDU guard is configured, that port is put into errdisable state (nearly the same as shutdown state) immediately. Root Guard ensures that the port on which root guard is enabled is the designated port. If the bridge receives superior BPDUs on a root guard-enabled port, root guard moves this port to a rootinconsistent STP state (which is equal to STP listening state). No traffic is forwarded across this port. In this way, the root guard enforces the position of the root bridge. When BPDU filtering is enabled on a specific port, it prevents this port from sending or receiving BPDUs (so if BPDUs are seen, they will be dropped)
Drag drop about DNS related commands
Answer: + ip dns-server: enable the DNS server on the device + ip domain list: specifies a sequence of domain names. + ip domain lookup: enable dns lookup + ip domain name: specifies the default domain to append to unqualified host name. + ip host: statically map on ip address to host name + ip name-server: identified a DNS server to provide lookup service
Refer to the exhibit. Drag and drop the routing table components on the left onto the corresponding letter from the exhibit on the right. Not all options are used.
Answer: A: route source B: administrative distance C: metric D: timestamp E: outbound interface
Drag and drop each WAN design option on the left onto the correct description on the right.
Answer: single-multihomed: one or more routers with connections to two or more ISPs dual-multihomed: one or more routers with redundant connections to two or more ISPs single-homed: one router with a connection to an ISP dual-homed: one router with two connections to the same ISP
Refer to the exhibit. The server on this network is configured with an MTU of 9216 and the two interfaces on router R1 are configured for MTUs of 2000 and 3000, as shown. What is the largest packet size that can pass between the workstation and the server? A. 1500 bytes B. 2000 bytes C. 3000 bytes D. 9216 bytes
Answer: A Explanation Maximum Transmission Unit (MTU) defines the largest size of packets that an interface can transmit without the need to fragment. IP packets larger than the MTU must go through IP fragmentation procedures. By default, Ethernet has a MTU of 1500 bytes (= 1460 bytes of Payload + 20 bytes of TCP + 20 bytes IP). Therefore in this case although R1's MTUs on the two interfaces were increased but the ones on other routers did not so the largest packet size we can send here is still 1500 bytes.
Refer to the exhibit. Each of these four switches has been configured with a hostname, as well as being configured to run RSTP. No other configuration changes have been made. Which three of these show the correct RSTP port roles for the indicated switches and interfaces? (Choose three) A. SwitchA, Fa0/2, designated B. SwitchA, Fa0/1, root C. SwitchB, Gi0/2, root D. SwitchB, Gi0/1, designated E. SwitchC, Fa0/2, root F. SwitchD, Gi0/2, root
Answer: A B F
Refer to the exhibit.Which two statements about the network environment of router R1 must be true? (Choose two) A. there are 20 different network masks within the 10.0.0.0/8 network B. A static default route to 10.85.33.14 was defined C. Ten routes are equally load-balanced between Te0/1/0.100 and Te0/2/0.100 D. The 10.0.0.0/8 network was learned via external EIGRP E. The EIGRP administrative distance was manually changed from 90 to 170
Answer: A C Explanation From the sixth line ―10.0.0.0/8 is variably subnetted, 6692 subnets, 20 masks‖ we can conclude there are 20 different network masks (which means 20 different subnets) of 10.0.0.0/8 network. Also we can count there are ten subnets that are equally load-balanced between two subinterfaces of Te0/1/0 & Te0/2/0.
Refer to the exhibit. The output that is shown is generated at a switch. Which three of these statements are true? (Choose three) A. All ports will be in a state of discarding, learning or forwarding. B. Thirty VLANs have been configured on this switch. C. The bridge priority is lower than the default value for spanning tree. D. All interfaces that are shown are on shared media. E. All designated ports are in a forwarding state. F. The switch must be the root bridge for all VLANs on this switch. Refer to the exhibit. The output that is shown is generated at a switch. Which three of these statements are true? (Choose three) A. All ports will be in a state of discarding, learning or forwarding. B. Thirty VLANs have been configured on this switch. C. The bridge priority is lower than the default value for spanning tree. D. All interfaces that are shown are on shared media. E. All designated ports are in a forwarding state. F. The switch must be the root bridge for all VLANs on this switch.
Answer: A C E
Which two actions must you take to correctly configure PPPoE on a client? (Choose two) A. Define a dialer interface B. Create a dialer pool and bind it to the virtual template C. Define a virtual template interface D. Create a dialer pool and bind it to the physical interface. E. Create a BBA group and link it to the dialer interface
Answer: A D Explanation The picture below shows all configuration needed for PPPoE. But please only pay attention to the PPPoE on the client: From this configuration we see that we need to create a Dialer interface first (interface Dialer 2) and create a dialer pool (dialer pool 1) under it. Then bind this dialer pool to the physical E0/1 interface (with the command ―pppoe-client dial-pool-number 1‖ command).
Which of the following statements describe the network shown in the graphic? (Choose two) A. There are two broadcast domains in the network. B. There are four broadcast domains in the network. C. There are six broadcast domains in the network. D. There are four collision domains in the network. E. There are five collision domains in the network. F. There are seven collision domains in the network.
Answer: A F
A network administrator needs to configure a serial link between the main office and a remote location. The router at the remote office is a non-Cisco router. How should the network administrator configure the serial interface of the main office router to make the connection?
Answer: B
A technician has installed SwitchB and needs to configure it for remote access from the management workstation connected SwitchA. Which set of commands is required to accomplish this task? A. SwitchB(config)#interface FastEthernet 0/1 SwitchB(config-if)#ip address 192.168.8.252 255.255.255.0 SwitchB(config-if)#no shutdown B. 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 C. SwitchB(config)#interface vlan 1 SwitchB(config-if)#ip address 192.168.8.252 255.255.255.0 SwitchB(config-if)#ip default-gateway 192.168.8.254 255.255.255.0 SwitchB(config-if)#no shutdown D. SwitchB(config)#ip default-network 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
Answer: B
Refer to the exhibit. What is the most appropriate summarization for these routes? A. 10.0.0.0/21 B. 10.0.0.0/22 C. 10.0.0.0/23 D. 10.0.0.0/24
Answer: B
Refer to the exhibit. Which of these statements correctly describes the state of the switch once the boot process has been completed? A. As FastEthernet0/12 will be the last to come up, it will not be blocked by STP. B. Remote access management of this switch will not be possible without configuration change. C. More VLANs will need to be created for this switch. D. The switch will need a different IOS code in order to support VLANs and STP.
Answer: B
Refer to the exhibit: How should the FastEthernet0/1 port on the 2950 model switches that are shown in the exhibit be configured to allow connectivity between all devices? A. The ports only need to be connected by a crossover cable. B. SwitchX (config)#interface FastEthernet 0/1 SwitchX(config-if)#switchport mode trunk C. SwitchX (config)#interface FastEthernet 0/1 SwitchX(config-if)#switchport mode access SwitchX(config-if)#switchport access vlan 1 D. SwitchX (config)#interface FastEthernet 0/1 SwitchX(config-if)#switchport mode trunk SwitchX(config-if)#switchport trunk vlan 1 SwitchX(config-if)#switchport trunk vlan 10 SwitchX(config-if)#switchport trunk vlan 20
Answer: B
Which command should you enter to view the error log in an EIGRP for IPv6 environment? A. show ipv6 eigrp traffic B. show ipv6 eigrp topology C. show ipv6 eigrp events D. show ipv6 eigrp neighbors
Answer: C Explanation The ―show ipv6 eigrp events‖ command displays EIGRP events logged for IPv6. An example of the output of this command is shown below:
Refer to the exhibit. Which BGP configuration do you need to apply to router R4 to allow traffic to flow normally on this network? A. router bgp 1 no synchronization neighbor 192.168.1.1 remote-as 1 neighbor 192.168.1.1 ebgp-multihop 4 neighbor 192.168.2.1 remote-as 1 neighbor 192.168.2.1 ebgp-multihop 4 neighbor 192.168.3.1 remote-as 5 no auto-summary B. router bgp 1 no synchronization neighbor 192.168.1.1 remote-as 1 neighbor 192.168.2.1 remote-as 1 neighbor 192.168.3.1 remote-as 5 no auto-summary C. router bgp 1 no synchronization neighbor 192.168.1.1 remote-as 1 neighbor 192.168.2.1 remote-as 1 neighbor 192.168.2.1 ebgp-multihop 4 neighbor 192.168.3.1 remote-as 5 no auto-summary D. router bgp1 no synchronization neighbor 192.168.1.1 remote-as 1 neighbor 192.168.1.1 ebgp-multihop 4 neighbor 192.168.2.1 remote-as 1 neighbor 192.168.2.1 ebgp-multihop 4 neighbor 192.168.3.1 remote-as 5 neighbor 192.168.3.1 ebgp-multihop 4 no auto-summary
Answer: B Explanation The "ebgp-multihop" command should only be used when configuring external BGP (eBGP) neighbors which are not directly connected. This command is not necessary for iBGP ngeighbor. In this question R1, R2 and R4 belongs to AS 1 so we don't need this command. Note: By default the TTL of eBGP connection is set to 1 so eBGP neighbors are required to be directly connected. The ―ebgp-multihop‖ command increases the eBGP Time-to-live (TTL) values of BGP connections to external peers.
Refer to the topology shown in the exhibit. Which ports will be STP designated ports if all the links are operating at the same bandwidth? (Choose three) A. Switch A - Fa0/0 B. Switch A - Fa0/1 C. Switch B - Fa0/0 D. Switch B - Fa0/1 E. Switch C - Fa0/0 F. Switch C - Fa0/1
Answer: B C D
Refer to the exhibit. A junior network administrator was given the task of configuring port security on SwitchA to allow only PC_A to access the switched network through port fa0/1. If any other device is detected, the port is to drop frames from this device. The administrator configured the interface and tested it with successful pings from PC_A to RouterA, and then observes the output from these two show commands. Which two of these changes are necessary for SwitchA to meet the requirements? (Choose two) A. Port security needs to be globally enabled. B. Port security needs to be enabled on the interface. C. Port security needs to be configured to shut down the interface in the event of a violation. D. Port security needs to be configured to allow only one learned MAC address. E. Port security interface counters need to be cleared before using the show command. F. The port security configuration needs to be saved to NVRAM before it can become active.
Answer: B D
Refer to the exhibit. All of the routers in the network are configured with the ip subnet-zero command. Which network addresses should be used for Link A and Network A? (Choose two) A. Network A - 172.16.3.48/26 B. Network A - 172.16.3.128/25 C. Network A - 172.16.3.192/26 D. Link A - 172.16.3.0/30 E. Link A - 172.16.3.40/30 F. Link A - 172.16.3.112/30
Answer: B D
Refer to the exhibit. The following commands are executed on interface fa0/1 of 2950Switch. 2950Switch(config-if)#switchport port-security 2950Switch(config-if)#switchport port-security mac-address sticky 2950Switch(config-if)#switchport port-security maximum 1 The Ethernet frame that is shown arrives on interface fa0/1. What two functions will occur when this frame is received by 2950Switch? (Choose two) A. The MAC address table will now have an additional entry of fa0/1 FFFF.FFFF.FFFF. B. Only host A will be allowed to transmit frames on fa0/1. C. This frame will be discarded when it is received by 2950Switch. D. All frames arriving on 2950Switch with a destination of 0000.00aa.aaaa will be forwarded out fa0/1. E. Hosts B and C may forward frames out fa0/1 but frames arriving from other switches will not be forwarded out fa0/1. F. Only frames from source 0000.00bb.bbbb, the first learned MAC address of 2950Switch, will be forwarded out fa0/1.
Answer: B D
The network shown in the diagram is experiencing connectivity problems. Which of the following will correct the problems? (Choose two) A. Configure the gateway on Host A as 10.1.1.1. B. Configure the gateway on Host B as 10.1.2.254. C. Configure the IP address of Host A as 10.1.2.2. D. Configure the IP address of Host B as 10.1.2.2. E. Configure the masks on both hosts to be 255.255.255.224. F. Configure the masks on both hosts to be 255.255.255.240.
Answer: B D
Which two statements about the interface that generated the output are true? (Choose two) A. The interface is error-disabled if packets arrive from a new unknown source address. B. It has dynamically learned two secure MAC addresses. C. The security violation counter increments if packets arrive from a new unknown source address. D. Learned MAC addresses are deleted after five minutes of inactivity. E. It has dynamically learned three secure MAC addresses.
Answer: B D Explanation There are two "sticky MAC Addresses" so it has learned two secure MAC addresses dynamically. The "Aging Time" is 5 minutes if no activity is detected (Aging Type: Inactivity) Note: There is one MAC address that has been manually configured
Refer to the exhibit: Which three statements correctly describe Network Device A? (Choose three) A. With a network wide mask of 255.255.255.128, each interface does not require an IP address. B. With a network wide mask of 255.255.255.128, each interface does require an IP address on a unique IP subnet. C. With a network wide mask of 255.255.255.0, must be a Layer 2 device for the PCs to communicate with each other. D. With a network wide mask of 255.255.255.0, must be a Layer 3 device for the PCs to communicate with each other. E. With a network wide mask of 255.255.254.0, each interface does not require an IP address.
Answer: B D E
Refer to the exhibit. 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? (Choose three) A. Ensure that the Ethernet encapsulations match on the interconnected router and switch ports. B. Ensure that cables A and B are straight-through cables. C. Ensure cable A is plugged into a trunk port. D. Ensure the switch has power. E. Reboot all of the devices. F. Reseat all cables.
Answer: B D F
Refer to the exhibit Which two facts can you determine from the EIGRP topology table? (Choose two) A. If a route has more than one successor, only one route is injected into the routing table. B. The FD 28416 for route 10.242.0.148 is also the metric for the routing table C. The variance command must have been issued to allow route 10.85.184.0 to have two Successors. D. The reported distance value is greater than the feasible distance E. All successors are injecting into the routing table
Answer: B E
In APIC-EM what is the icon if there is an ACL on the device blocking the traffic on the path?
Answer: C
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? A. Switch1 (config)# line con0 Switch1 (config-line)# password cisco Switch1 (config-line)#login B. Switch1 (config)# interface fa0/1 Switch 1(config-if)# ip address 192.168.24.3 255.255.255.0 C. Switch1 (config)# ip default-gateway 192.168.24.1 D. Switch1 (config)# interface fa0/1 Switch 1(config-if)# duplex full Switch 1(config-if)# speed 100 E. Switch1 (config)# interface fa0/1 Switch 1(config-if)# switchport mode trunk
Answer: C
Users on the 172.17.22.0 network cannot reach the server located on the 172.31.5.0 network. The network administrator connected to router Coffee via the console port, issued the show ip route command. Based on the output of the show ip route command and the topology shown in the graphic, what is the cause of the failure? A. The network has not fully converged. B. IP routing is not enabled. C. A static route is configured incorrectly. D. The FastEthernet interface on Coffee is disabled. E. The neighbor relationship table is not correctly updated. F. The routing table on Coffee has not updated.
Answer: C Explanation There are no dynamic routing protocols running on Coffee router, only a default route is configured to route all traffic to 172.19.22.2 but we don't know about this network. The correct IP address should be the IP address on the interface of Tea router which is connected to Coffee router (maybe 172.18.22.2).
How does 802.1Q identify the VLAN that the frame belongs to while it crosses the trunk link? A. It encapsulates the entire frame with a 30 byte header and FCS B. It encapsulates the entire frame with a 30 bits header and FCS C. It places a 4 byte tag after the source MAC address in the frame D. It places a 4 bit tag after the source MAC address in the frame
Answer: C Explanation 802.1Q frame includes a 4 byte tag after the source MAC address to identify the VLAN that the frame belongs to.
Refer to the exhibit. If the router attempts to send a frame out of the interface, but the carrier is busy, which counter will increment? A. lost carrier B. late collision C. deferred D. collisions
Answer: C Explanation The deferred counter counts the number of times the interface has tried to send a frame, but found the carrier busy at the first attempt (Carrier Sense). This does not constitute a problem, and is part of normal Ethernet operation. Note: + The collisions counter counts the number of frames for which one or more collisions occurred when the frames were sent. + When a collision is detected by a station after it has sent the 512th bit of its frame, it is counted as a late collision (and the late collision counter will increase). Possible causes are usually incorrect cabling or a non-compliant number of hubs in the network. Bad network interface cards (NICs) can also cause late collisions The lost carrier counter increases each time a carrier sense loss occurs (The number of times the carrier was lost in transmission). This happens when the hardware is transmitting a frame onto the wire and does not see its own carrier wave on the Ethernet. Common Causes: Check for a bad cable. Check the physical connection on both sides.
What does a 2900 ISR do if the POST is successful during start up, but there is no configuration file to load? A. It shuts down B. It creates a configuration file with default settings and loads user EXEC mode C. It initiates the system configuration dialog D. It reboots E. It enters ROMMON mode
Answer: C Explanation The following details the router boot process: 1. The router is powered on. 2. The router first runs Power-On Self Test (POST) 3. The bootstrap checks the Configuration Register value to specify where to load the IOS. By default (the default value of Configuration Register is 2102, in hexadecimal), the router first looks for ―boot system‖ commands in startup-config file. If it finds these commands, it will run boot system commands in order they appear in startup-config to locate the IOS. If not, the IOS image is loaded from Flash . If the IOS is not found in Flash, the bootstrap can try to load the IOS from TFTP server or from ROM (mini-IOS). 4. After the IOS is found, it is loaded into RAM. 5. The IOS attempts to load the configuration file (startup-config) from NVRAM to RAM. If the startup-config is not found in NVRAM, the IOS attempts to load a configuration file from TFTP. If no TFTP server responds, the router enters Setup Mode (Initial Configuration Mode).
Refer to the exhibit. What two results would occur if the hub were to be replaced with a switch that is configured with one Ethernet VLAN? (Choose two) Note: This question may or may not have the exhibit A. The number of collision domains would remain the same. B. The number of collision domains would decrease. C. The number of collision domains would increase. D. The number of broadcast domains would remain the same. E. The number of broadcast domains would decrease. F. The number of broadcast domains would increase.
Answer: C D
Refer to the exhibit. Which two statements about router R1 are true? (Choose two) A. the router has two EIGRP neighbors and one OSPF neighbor B. at least two IGP routing protocols are running on the router C. at least three IGP routing protocols are running on the router D. the router is learning external OSPF and EIGRP routes E. the router has an OSPF Area 0 adjacency with the device at 10.82.4.42
Answer: C D
Which two TCP messages use a 32-bit number as part of the initial TCP handshake? (Choose two) A. FIN B. RST C. SYN D. SYN-ACK E. ACK
Answer: C E
Which two events occur on the interface, if packets from an unknown source address arrive after the interface learns the maximum number of secure MAC addresses? (Choose two) A. A syslog message is generated B. The port LED turns off C. The interface drops traffic from unknown MAC addresses D. The interface is error-disabled E. The security violation counter does not increment
Answer: C E Explanation In "Protect" mode the security violation counter does not increase when a violation occurs. The interface is not put into error-disabled mode either
Refer to the exhibit Which two pieces of information can you determine from the EIGRP topology table? (Choose two) A. Route 10.42.88.0/21 has an administrative distance of 28160 B. Route 10.42.91.0/24 has a tag of 28160 C. Each route has only one best path D. The EIGRP neighbor IP address is 10.111 253.216 E. The reported distance of 10.0.0.0/8 is 0
Answer: C E Explanation ―Reported distance‖ is also the ―Advertised distance‖ and it is the second parameter in the bracket. In this question it is 0 (10.0.0./8, ..... via Redistributed (1732096/0).
Which destination addresses will be used by Host A to send data to Host C? (Choose two) A. the IP address of Switch 1 B. the MAC address of Switch 1 C. the IP address of Host C D. the MAC address of Host C E. the IP address of the router's E0 interface F. the MAC address of the router's E0 interface
Answer: C F Explanation While transferring data through many different networks, the source and destination IP addresses are not changed. Only the source and destination MAC addresses are changed. So in this case Host A will use the IP address of Host C and the MAC address of E0 interface to send data. When the router receives this data, it replaces the source MAC address with it own E1 interface's MAC address and replaces the destination MAC address with Host C's MAC address before sending to Host C -> C and F are correct.
A network administrator is troubleshooting the OSPF configuration of routers R1 and R2. The routers cannot establish an adjacency relationship on their common Ethernet link. The graphic shows the output of the show ip ospf interface e0 command for routers R1 and R2. Based on the information in the graphic, what is the cause of this problem? A. The OSPF area is not configured properly. B. The priority on R1 should be set higher. C. The cost on R1 should be set higher. D. The hello and dead timers are not configured properly. E. A backup designated router needs to be added to the network. F. The OSPF process ID numbers must match.
Answer: D
If Computer A is sending traffic to computer B, which option is the source IP address when a packet leaves R1 on interface F0/1? A. IP address of the R2 interface F0/1 B. IP address of computer B C. IP address of R1 interface F0/1 D. IP address of Computer A
Answer: D
Refer to the exhibit. If the devices produced the given output, what is the cause of the EtherChannel problem? A. SW1's Fa0/1 interface is administratively shut down. B. There is an encapsulation mismatch between SW1's Fa0/1 and SW2's Fa0/1 interfaces. C. There is an MTU mismatch between SW1's Fa0/1 and SW2's Fa0/1 interfaces. D. There is a speed mismatch between SW1's Fa0/1 and SW2's Fa0/1 interfaces.
Answer: D
Refer to the exhibit. Based on the exhibited routing table, how will packets from a host within the 192.168.10.192/26 LAN be forwarded to 192.168.10.1? A. The router will forward packets from R3 to R2 to R1 B. The router will forward packets from R3 to R1 C. The router will forward packets from R3 to R1 to R2 D. The router will forward packets from R3 to R2 to R1 AND from R3 to R1
Answer: D
Refer to the exhibit. HostA cannot ping HostB. Assuming routing is properly configured, what could be the cause of this problem? A. HostA is not on the same subnet as its default gateway. B. The address of SwitchA is a subnet address. C. The Fa0/0 interface on RouterA is on a subnet that can't be used. D. The serial interfaces of the routers are not on the same subnet. E. The Fa0/0 interface on RouterB is using a broadcast address.
Answer: D
Refer to the exhibit. Which statement is true? A. The Fa0/11 role confirms that SwitchA is the root bridge for VLAN 20. B. VLAN 20 is running the Per VLAN Spanning Tree Protocol. C. The MAC address of the root bridge is 0017.596d.1580. D. SwitchA is not the root bridge, because not all of the interface roles are designated.
Answer: D
Which Rapid PVST+ port role provides a different path to the root bridge? A. designated B. forwarding C. backup D. alternate
Answer: D Explanation Rapid PVST+ assigns one of these port roles to individual ports: * Root port - A forwarding port that is the closest to the root bridge in terms of path cost * Designated port - A forwarding port for every LAN segment * Alternate port - A best alternate path to the root bridge. This path is different than using the root port. The alternative port moves to the forwarding state if there is a failure on the designated port for the segment. * Backup port - A backup/redundant path to a segment where another bridge port already connects. The backup port applies only when a single switch has two links to the same segment (collision domain). To have two links to the same collision domain, the switch must be attached to a hub. * Disabled port - Not strictly part of STP, a network administrator can manually disable a port The topology below helps you understand more clearly about these port roles:
What is the difference between a CSU/DSU and a modem? A. A CSU/DSU converts analog signals from a router to a leased line; a modem converts analog signals from a router to a leased line. B. A CSU/DSU converts analog signals from a router to a phone line; a modem converts digital signals from a router to a leased line. C. A CSU/DSU converts digital signals from a router to a phone line; a modem converts analog signals from a router to a phone line. D. A CSU/DSU converts digital signals from a router to a leased line; a modem converts digital signals from a router to a phone line.
Answer: D Explanation A modem modulates outgoing digital signals from a computer or other digital device to analog signals for a conventional copper twisted pair telephone line and demodulates the incoming analog signal and converts it to a digital signal for the digital device.
Refer to the exhibit. Router edge-1 is unable to establish OSPF neighbor adjacency with router ISP1. Which two configuration changes can you make on edge-1 to allow the two routers to establish adjacency? (Choose two) A. Set the subnet mask on edge-1 to 255 255.255.252. B. Reduce the MTU on edge-1 to 1514. C. Set the OSPF cost on edge-1 to 1522. D. Reduce the MTU on edge-1 to 1500. E. Configure the ip ospf mtu-ignore command on the edge-1 Gi0/0 interface.
Answer: D E
Refer to the exhibit. Which two statements about the interface that generated the output are true? (Choose two) A. Two secure MAC address are manually configured on the interface B. A syslog message is generated when the maximum number of secure MAC addresses is on the interface C. The interface is error-disabled D. The interface dynamically learned two secure MAC addresses E. An SNMP trap is generated when the maximum number of secure MAC addresses is reached on the interface
Answer: D E (and C) Explanation An SNMP trap is generated when the port-security mode is ―Strict‖ or ―Shutdown‖ -> Answer E is correct. From the output we learn that: "Sticky MAC Addresses: 2" -> Two MAC addresses were learned dynamically with the ―switchport port-security mac-address sticky‖ command -> Answer D is correct. "Configured MAC Addresses: 0" -> There are no static MAC address configured (with the command "switchport port-security mac-address MAC-address") "Security Violation Count: 1" -> A security violation occurred "Port status: Secure-shutdown": this port is in err-disabled state (as it is in "shutdown" mode when a security violation occurs) so answer C is correct too So in fact there are three correct answers in this question.
