final study 1
What address and prefix length is used when configuring an IPv6 default static route?
::/0
Which problem is evident if the show ip interface command shows that the interface is down and the line protocol is down?
A cable has not been attached to the port.
DHCPREQUEST
A message that is used to identify the explicit server and lease offer to accept
DHCPDISCOVER
A message that is used to locate any available DHCP server on the network
DHCPOFFER
A message that is used to suggest a lease to a client
Refer to the exhibit. How is a frame sent from PCA forwarded to PCC if the MAC address table on switch SW1 is empty?
SW1 floods the frame on all ports on SW1, excluding the port through which the frame entered the switch. (When a switch powers on, the MAC address table is empty. The switch builds the MAC address table by examining the source MAC address of incoming frames. The switch forwards based on the destination MAC address found in the frame header. If a switch has no entries in the MAC address table or if the destination MAC address is not in the switch table, the switch will forward the frame out all ports except the port that brought the frame into the switch.)
A small publishing company has a network design such that when a broadcast is sent on the LAN, 200 devices receive the transmitted broadcast. How can the network administrator reduce the number of devices that receive broadcast traffic?
Segment the LAN into smaller LANs and route between them. (By dividing the one big network into two smaller network, the network administrator has created two smaller broadcast domains. When a broadcast is sent on the network now, the broadcast will only be sent to the devices on the same Ethernet LAN. The other LAN will not receive the broadcast.)
Gateway of last resort is not set.172.18.109.0/26 is variously subnetted, 7 subnets, 3 masksO 172.18.109.0/26 [110/10] via 172.18.32.1, 00:00:24, Serial0/0/0O 172.18.109.64/26 [110/20] via 172.18.32.6, 00:00:56, Serial 0/0/1O 172.18.109.128/26 [110/10] via 172.18.32.1, 00:00:24, Serial 0/0/0C 172.18.109.192/27 is directly connected, GigabitEthernet0/0L 172.18.109.193/27 is directly connected, GigabitEthernet0/0C 172.18.109.224/27 is directly connected, GigabitEthernet0/1L 172.18.109.225/27 is directly connected, GigabitEthernet0/1172.18.32.0/24 is variably subnetted, 4 subnets, 2 masksC 172.18.32.0/30 is directly connected, Serial0/0/0L 172.18.32.2/32 is directly connected, Serial0/0/0C 172.18.32.4/30 is directly connected, Serial0/0/1L 172.18.32.5/32 is directly connected, Serial0/0/1S 172.18.33.0/26 [1/0] via 172.18.32.1, 00:00:24, Serial0/0/0R1# Refer to the exhibit. Which interface will be the exit interface to forward a data packet that has the destination IP address 172.18.109.152?
Serial0/0/0
A small coffee shop is offering free Wi-Fi to customers. The network includes a wireless router and a DSL modem that is connected to the local phone company. What method is typically used to configure the connection to the phone company?
Set the WAN connection in the wireless router as a DHCP client.
A network administrator is using the router-on-a-stick method to configure inter-VLAN routing. Switch port Gi1/1 is used to connect to the router. Which command should be entered to prepare this port for the task?
Switch(config)# interface gigabitethernet 1/1Switch(config-if)# switchport mode trunk
Refer to the exhibit. Based on the command output shown, what is the status of the EtherChannel?
The EtherChannel is in use and functional as indicated by the SU and P flags in the command output. (The command output shows the port channel as SU , which means Layer 2 and in use ; and the FastEthernet 0/10 and 0/11 interfaces are bundled in port-channel as indicated by the P flag. Configuring the EtherChannel using the channel-group 1 mode on command will cause the Protocol field in the command output to be empty.)
Refer to the exhibit. The users on the LAN network of R1 cannot receive an IPv6 address from the configured stateful DHCPv6 server. What is missing from the stateful DHCPv6 configuration on router R1?
The FA0/0 interface is missing the command that informs the clients to use stateful DHCPv6. (When configuring a router interface for stateful DHCPv6, the router must be able to inform the host PC's to receive IPv6 addressing from a stateful DHCPv6 server. The interface command is ipv6 nd managed-config-flag)
Refer to the exhibit. The administrator wants to enable port security on an interface on switch S1, but the command was rejected. Which conclusion can be drawn?
The interface must be initially configured with the switchport mode access command.
An administrator has configured a DHCPv4 relay router and issued these commands: Router(config)# interface g0/0Router(config-if)# ip address 10.0.1.1 255.255.255.0Router(config-if)# no shutdownRouter(config-if)# exitRouter(config)# ip dhcp pool RELAYRouter(dhcp-config)# end The clients are not receiving IP parameters from the DHCPv4 server. What is a possible cause?
The ip helper-address command is missing (This router should be configured with the ip helper-address command, followed with the IP address of the DHCPv4 server, because the router is meant to be used as a relay agent. The ip dhcp pool RELAY command just names the DHCPv4 pool, and it does not enable the relay function.)/;
A network administrator is configuring a WLC to provide WLAN access to users in an office building. When testing the newly created WLAN, the administrator does not see the SSID from a wireless device. What is a possible cause?
The new WLAN needs to be enabled.
What is a result of connecting two or more switches together?
The size of the broadcast domain is increased.
Refer to the exhibit. Router R1 has an OSPF neighbor relationship with the ISP router over the 192.168.0.32 network. The 192.168.0.36 network link should serve as a backup when the OSPF link goes down. The floating static route command ip route 0.0.0.0 0.0.0.0 S0/0/1 100 was issued on R1 and now traffic is using the backup link even when the OSPF link is up and functioning. Which change should be made to the static route command so that traffic will only use the OSPF link when it is up?
Change the administrative distance to 120.
A junior technician was adding a route to a LAN router. A traceroute to a device on the new network revealed a wrong path and unreachable status. What should be done or checked?
Check the configuration of the exit interface on the new static route.
Refer to the exhibit. Inter-VLAN communication between VLAN 10, VLAN 20, and VLAN 30 is not successful. What is the problem?
The switch interface FastEthernet0/1 is configured as an access interface and should be configured as a trunk interface. (To forward all VLANs to the router, the switch interface Fa0/1 must be configured as a trunk interface with the switchport mode trunk command.)
network administrator is implementing DHCPv6 for the company. The administrator configures a router to send RA messages with M flag as 1 by using the interface command ipv6 nd managed-config-flag . What effect will this configuration have on the operation of the clients?
Clients must use all configuration information that is provided by a DHCPv6 server. (Under stateful DHCPv6 configuration, which is indicated by setting M flag as 1 (through the interface command ipv6 nd managed-config-flag ), the dynamic IPv6 address assignments are managed by the DHCPv6 server. Clients must obtain all configuration information from a DHCPv6 server.)
After sticky learning of MAC addresses is enabled, what action is needed to prevent dynamically learned MAC addresses from being lost in the event that an associated interface goes down?
Copy the running configuration to the startup configuration.
Refer to the exhibit. A network administrator is configuring DAI on switch SW1. What is the result of entering the exhibited commands?
DAI will validate only the destination MAC addresses.
What is the best way to prevent a VLAN hopping attack?
Disable trunk negotiation for trunk ports and statically set nontrunk ports as access ports.
Which Cisco solution helps prevent ARP spoofing and ARP poisoning attacks?
Dynamic ARP Inspection
A network engineer is configuring a LAN with a redundant first hop to make better use of the available network resources. Which protocol should the engineer implement?
GLBP
A technician is configuring a new Cisco 2960 switch. What is the effect of issuing the BranchSw(config)#interface VLAN88 command?
It enters configuration mode for a switch virtual interface.
Which statement describes the behavior of a switch when the MAC address table is full?
It treats frames as unknown unicast and floods all incoming frames to all ports within the local VLAN.
IEEE standard that reduces the number of STP instances
MSTP
Cisco Implementation of IEEE 802.1D
PVST+
What is an advantage of PVST+?
PVST+ optimizes performance on the network through load sharing. (PVST+ results in optimum load balancing. However, this is accomplished by manually configuring switches to be elected as root bridges for different VLANs on the network. The root bridges are not automatically selected. Furthermore, having spanning-tree instances for each VLAN actually consumes more bandwidth and it increases the CPU cycles for all the switches in the network.)
What are two characteristics of Cisco Express Forwarding (CEF)? (Choose two.)
Packets are forwarded based on information in the FIB and an adjacency table. This is the fastest forwarding mechanism on Cisco routers and multilayer switches.
What is a potential issue when using the WLC to upgrade and deploy the latest firmware image to all APs?
Users will not be able to use the WLAN.
A network administrator of a college is configuring WLAN security with WPA2 Enterprise authentication. Which server is required when deploying this type of authentication?
RADIUS
Fast Converging enhancement of IEEE 802.1D
RSTP
Proprietary Per VLAN implementation of IEEE 802.1w
Rapid PVST+
Refer to the exhibit. How was the host route 2001:DB8:CAFE:4::1/128 installed in the routing table?
Router R1 will forward the packet out Gig0/0. Router R1 will de-encapsulate the packet and encapsulate it in a PPP frame.
Refer to the exhibit. When a packet arrives on interface Serial0/0/0 on R1, with a destination IP address of PC1, which two events occur? (Choose two)
Router R1 will forward the packet out Gig0/1. Router R1 will de-encapsulate the packet and encapsulate it in an Ethernet frame.
Refer to the exhibit. The configuration shows commands entered by a network administrator for inter-VLAN routing. However, host H1 cannot communicate with H2. Which part of the inter-VLAN configuration causes the problem?
VLAN configuration (All Cisco switch ports are assigned to VLAN 1 by default. For VLAN implementation, ports Fa0/1 and Fa0/2 should be assigned to VLAN 10 and VLAN 20, respectively. The missing commands on S1 are as follows: switchport access vlan 10 and switchport access vlan 20 .)
Which combination of WLAN authentication and encryption is recommended as a best practice for home users?
WPA2 and AES
What is the reason for disabling SSID broadcasting and changing the default SSID on a wireless access point?
Wireless clients must then have the SSID manually configured to connect to the wireless network.
HSRP
a Cisco proprietary FHRP that provides redundancy through use of an active device and standby device
Algorithm
a finite list of steps used to determine the best path
DHCPACK
a message that is used to suggest a lease to a client
VRRP
an open standard FHRP that provides redundancy through use of a virtual routers master and one or more backups
GLBP
an open standard FHRP that provides redundancy through use of virtual routers masters and one or more backups
On which port should Dynamic ARP Inspection (DAI) be configured on a switch?
an uplink port to another switch
Which term describes the role of a Cisco switch in the 802.1X port-based access control?
authenticator
passively waits for the neighbor to initiate trunking
dynamic auto
actively attempts to convert the link to a trunk
dynamic desirable
routing protocol messages
exchanges routing information and maintains accurate information about networks
Which three components are combined to form a bridge ID?
extended system ID MAC address bridge priority
What are two switch characteristics that could help alleviate network congestion? (Choose two.)
fast internal switching large frame buffers (Switch characteristics that help alleviate network congestion include fast port speeds, fast internal switching, large frame buffers, and high port density.)
Which command will start the process to bundle two physical interfaces to create an EtherChannel group via LACP?
interface range GigabitEthernet 0/4 - 5 (To specify the interfaces in an EtherChannel group, use the interface range interface global configuration command for the range of interfaces used. The interface range GigabitEthernet 0/4 - 5 command is the correct option because it specifies two interfaces for the EtherChannel group.)
Which command would create a valid IPv6 default route?
ipv6 route ::/0 2001:db8:acad:2::a
What type of VLAN is configured specifically for network traffic such as SSH, Telnet, HTTPS, HTTP, and SNMP?
management VLAN
requires manual configuration of trunking or nontrunking
nonegotiate
An employee connects wirelessly to the company network using a cell phone. The employee then configures the cell phone to act as a wireless access point that will allow new employees to connect to the company network. Which type of security threat best describes this situation?
rogue access point
Refer to the exhibit. The routing table for R2 is as follows: Gateway of last resort is not set 10.0.0.0/30 is subnetted, 2 subnetsC 10.0.0.0 is directly connected, Serial0/0/0C 10.0.0.4 is directly connected, Serial0/0/1192.168.10.0/26 is subnetted, 3 subnetsS 192.168.10.0 is directly connected, Serial0/0/0C 192.168.10.64 is directly connected, FastEthernet0/0S 192.168.10.128 [1/0] via 10.0.0.6 What will router R2 do with a packet destined for 192.168.10.129?
send the packet out interface Serial0/0/1
Refer to the exhibit. A network administrator is troubleshooting a problem with EtherChannel. What command was used to produce the exhibited output?
show interfaces fastethernet 0/11 etherchannel (The show interfaces fastethernet 0/11 etherchannel command will show the EtherChannel information for the FastEthernet 0/11 interface. The displayed information includes the port channel it belongs to, the current mode, and the channel group, among other information.)
Refer to the exhibit. DLS1 is connected to another switch, DLS2, via a trunk link. A host that is connected to DLS1 is not able to communicate to a host that is connected to DLS2, even though they are both in VLAN 99. Which command should be added to Fa0/1 on DLS1 to correct the problem?
switchport trunk native vlan 66 (When configuring 802.1Q trunk links, the native VLAN must match on both sides of the link, or else CDP error messages will be generated, and traffic that is coming from or going to the native VLAN will not be handled correctly.)
data structures
tables or databases that are stored in ram
What are the two methods that a wireless NIC can use to discover an AP? (Choose two.)
transmitting a probe request receiving a broadcast beacon frame
permanent trunking mode
trunk
Which type of traffic is designed for a native VLAN?
untagged
In what situation would a Layer 2 switch have an IP address configured?
when the Layer 2 switch needs to be remotely managed
Consider the following command: ip route 192.168.10.0 255.255.255.0 10.10.10.2 5 What does the 5 at the end of the command signify?
Administrative distance
Refer to the exhibit. PC-A and PC-B are both in VLAN 60. PC-A is unable to communicate with PC-B. What is the problem?
The VLAN that is used by PC-A is not in the list of allowed VLANs on the trunk. (Because PC-A and PC-B are connected to different switches, traffic between them must flow over the trunk link. Trunks can be configured so that they only allow traffic for particular VLANs to cross the link. In this scenario, VLAN 60, the VLAN that is associated with PC-A and PC-B, has not been allowed across the link, as shown by the output of show interfaces trunk.)
