sem 2 finial review
What are three techniques for mitigating VLAN attacks?
- Enable truck Manually - Disable DTP - Set native vlan to unused VLAN
A new Layer 3 switch is connected to a router and is being configured for interVLAN routing. What are three of the five steps required for the configuration?
-Assigning ports to the VLANs -Enabling IP routing -Creating SVI interfaces
Which three steps should be taken before moving a Cisco switch to a new VTP management domain? (Choose three.)
-Configure the switch with the name of the new management domain.-Select the correct VTP mode and version. -Reboot the switch
Which two statements are characteristics of routed ports on a multilayer switch?
-In a switched network, they are mostly configured between switches at the core and distribution layers. -They are not associated with a particular VLAN.
Which two statements are characteristics of routed ports on a multilayer switch? (Choose two.)
-In a switched network, they are mostly configured between switches at the core and distribution layers. -They are not associated with a particular VLAN.
Refer to the exhibit. A network administrator has added a new subnet to the network and needs hosts on that subnet to receive IPv4 addresses from the DHCPv4 server. What two commands will allow hosts on the new subnet to receive addresses from the DHCP4 server?
-R1(config-if)# ip helper-address 10.2.0.250 -R1(config)# interface G0/0
Which two types of spanning tree protocols can cause suboptimal traffic flows because they assume only one spanning-tree instance for the entire bridged network?
-RSTP -STP
Compared with dynamic routes, what are two advantages of using static routes on a router? (Choose two.)
-They improve network security. - They use fewer router resources
Compared with dynamic routes, what are two advantages of using static routes on a router?
-They improve network security.- They use fewer router resources
Refer to the exhibit. All the displayed switches are Cisco 2960 switches with the same default priority and operating at the same bandwidth. Which three ports will be STP designated ports? (Choose three.)
-fa0/13 -fa0/10 -fa0/21
Which two VTP modes allow for the creation, modification, and deletion of VLANs on the local switch? (Choose two.)
-server -transparent
Match the step to each switch boot sequence description. (Not all options are used.)
1. execute POST2. load the boot loader from ROM3. CPU register initializations4. flash file system initialization5. load the IOS6. transfer switch control to the IOS
Refer to the exhibit. What is the metric to forward a data packet with the IPv6 destination address 2001:DB8:ACAD:E:240:BFF:FED4:9DD2?
2682112
An administrator is trying to remove configurations from a switch. After using the command erase startup-config and reloading the switch, the administrator finds that VLANs 10 and 100 still exist on the switch. Why were these VLANs not removed?
Because these VLANs are stored in a file that is called vlan.dat that is located in flash memory, this file must be manually deleted.
Native VLAN
Carries untagged traffic
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.
Refer to the exhibit. R1 was configured with the static route command ip route 209.165.200.224 255.255.255.224 S0/0/0 and consequently users on network 172.16.0.0/16 are unable to reach resources on the Internet. How should this static route be changed to allow user traffic from the LAN to reach the Internet?
Change the destination network and mask to 0.0.0.0 0.0.0.0
An administrator notices that large numbers of packets are being dropped on one of the branch routers. What should be done or checked?
Check the routing table for a missing static route.
What is a secure configuration option for remote access to a network device?
Configure SSH.
Data VLAN
Configured to carry user-generated traffic.
Users are complaining of sporadic access to the internet every afternoon. What should be done or checked?
Create static routes to all internal networks and a default route to the internet.
Refer to the exhibit. A network administrator configures R1 for inter-VLAN routing between VLAN 10 and VLAN 20. However, the devices in VLAN 10 and VLAN 20 cannot communicate. Based on the configuration in the exhibit, what is a possible cause for the problem?
D. The command interface gigabitEthernet 0/0.1 is wrong.
What network attack seeks to create a DoS for clients by preventing them from being able to obtain a DHCP lease?
DHCP Starvation
A company has just switched to a new ISP. The ISP has completed and checked the connection from its site to the company. However, employees at the company are not able to access the internet. What should be done or checked?
Ensure that the old default route has been removed from the company edge routers.
How will a router handle static routing differently if Cisco Express Forwarding is disabled?
Ethernet multiaccess interfaces will require fully specified static routes to avoid routing inconsistencies.
What is the IPv6 prefix that is used for link-local addresses?
FE80::/10
Which statement is correct about how a Layer 2 switch determines how to forward frames?
Frame forwarding decisions are based on MAC address and port mappings in the CAM table.
What protocol or technology defines a group of routers, one of them defined as active and another one as standby?
HSRP
What is the effect of entering the ip dhcp snooping configuration command on a switch?
It enables DHCP snooping globally on a switch.
What is the effect of entering the spanning-tree portfast configuration command on a switch?
It enables portfast on a specific switch interface.
Refer to the exhibit. A network administrator is configuring inter-VLAN routing on a network. For now, only one VLAN is being used, but more will be added soon. What is the missing parameter that is shown as the highlighted question mark in the graphic?
It identifies the VLAN number.
A network administrator is preparing the implementation of Rapid PVST+ on a production network. How are the Rapid PVST+ link types determined on the switch interfaces?
Link types are determined automatically.
Refer to the exhibit. Which destination MAC address is used when frames are sent from the workstation to the default gateway?
MAC address of the virtual router
A cybersecurity analyst is using the macof tool to evaluate configurations of switches deployed in the backbone network of an organization. Which type of LAN attack is the analyst targeting during this evaluation?
MAC address table overflow
Refer to the exhibit. In addition to static routes directing traffic to networks 10.10.0.0/16 and 10.20.0.0/16, Router HQ is also configured with the following command: ip route 0.0.0.0 0.0.0.0 serial 0/1/1 What's the purpose of this command
Packets with a destination network that is not 10.10.0.0/16 or is not 10.20.0.0/16 or is not a directly connected network will be forwarded to the Internet.
Refer to the exhibit. In addition to static routes directing traffic to networks 10.10.0.0/16 and 10.20.0.0/16, Router HQ is also configured with the following command:ip route 0.0.0.0 0.0.0.0 serial 0/1/1Whats the purpose of this command
Packets with a destination network that is not 10.10.0.0/16 or is not 10.20.0.0/16 or is not a directly connected network will be forwarded to the Internet.
A network administrator uses the spanning-tree portfast bpduguard default global configuration command to enable BPDU guard on a switch. However, BPDU guard is not activated on all access ports. What is the cause of the issue?
PortFast is not configured on all access ports.
The exhibit shows two PCs called PC A and PC B, two routes called R1 and R2, and two switches. PC A has the address 172.16.1.1/24 and is connected to a switch and into an interface on R1 that has the IP address 172.16.1.254. PC B has the address 172.16.2.1/24 and is connected to a switch that is connected to another interface on R1 with the IP address 172.16.2.254. The serial interface on R1 has the address 172.16.3.1 and is connected to the serial interface on R2 that has the address 172.16.3.2/24. R2 is connected to the internet cloud. Which command will create a static route on R2 in order to reach PC B?
R2(config)# ip route 172.16.2.0 255.255.255.0 172.16.3.1
Refer to the exhibit. After attempting to enter the configuration that is shown in router RTA, an administrator receives an error and users on VLAN 20 report that they are unable to reach users on VLAN 30. What is causing the problem?
RTA is using the same subnet for VLAN 20 and VLAN 30.
A static route has been configured on a router. However, the destination network no longer exists. What should an administrator do to remove the static route from the routing table?
Remove the route using the no ip route command.
Refer to the exhibit. Which route was configured as a static route to a specific network using the next-hop address?
S 10.17.2.0/24 [1/0] via 10.16.2.2
Which method of IPv6 prefix assignment relies on the prefix contained in RA messages?
SLAAC
Which protocol adds security to remote connections?
SSH
What protocol or technology disables redundant paths to eliminate Layer 2 loops?
STP
Refer to the exhibit. A network administrator has connected two switches together using EtherChannel technology. If STP is running, what will be the end result?
STP will block one of the redundant links.
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.
Refer to the exhibit. Host A has sent a packet to host B. What will be the source MAC and IP addresses on the packet when it arrives at host B?
Source MAC: 00E0.FE91.7799 Source IP: 10.1.1.10
Refer to the exhibit. Host A has sent a packet to host B. What will be the source MAC and IP addresses on the packet when it arrives at host B?
Source MAC: 00E0.FE91.7799 Source IP: 10.1.1.10
Refer to the exhibit. If the IP addresses of the default gateway router and the DNS server are correct, what is the configuration problem?
The IP address of the default gateway router is not contained in the excluded address list.
A network administrator has found a user sending a double-tagged 802.1Q frame to a switch. What is the best solution to prevent this type of attack?
The VLANs for user access ports should be different VLANs than any native VLANs used on trunk ports.
Which statement describes a result after multiple Cisco LAN switches are interconnected?
The broadcast domain expands to all switches.
Refer to the exhibit. A network administrator is verifying the configuration of inter-VLAN routing. Users complain that PC2 cannot communicate with PC1. Based on the output, what is the possible cause of the problem?
The encapsulation dot1Q 5 command contains the wrong VLAN.
After a host has generated an IPv6 address by using the DHCPv6 or SLAAC process, how does the host verify that the address is unique and therefore usable?
The host sends an ICMPv6 neighbor solicitation message to the DHCP or SLAAC-learned address and if no neighbor advertisement is returned, the address is considered unique.
Refer to the exhibit. R1 has been configured as shown. However, PC1 is not able to receive an IPv4 address. What is the problem?
The ip helper-address command was applied on the wrong interface.
Successful inter-VLAN routing has been operating on a network with multiple VLANs across multiple switches for some time. When an inter-switch trunk link fails and Spanning Tree Protocol brings up a backup trunk link, it is reported that hosts on two VLANs can access some, but not all the network resources that could be accessed previously. Hosts on all other VLANS do not have this problem. What is the most likely cause of this problem?
The protected edge port function on the backup trunk interfaces has been disabled.
What is a result of connecting two or more switches together?
The size of the broadcast domain is increased.
Refer to the exhibit. A network administrator is configuring a router as a DHCPv6 server. The administrator issues a show ipv6 dhcp pool command to verify the configuration. Which statement explains the reason that the number of active clients is 0?
The state is not maintained by the DHCPv6 server under stateless DHCPv6 operation
What action takes place when a frame entering a switch has a multicast destination MAC address?
The switch adds a MAC address table entry mapping for the destination MAC address and the ingress port.
What action takes place when the source MAC address of a frame entering a switch appears in the MAC address table associated with a different port?
The switch replaces the old entry and uses the more current port.
Refer to the exhibit. Which trunk link will not forward any traffic after the root bridge election process is complete?
Trunk2
Branch users were able to access a site in the morning but have had no connectivity with the site since lunch time. What should be done or checked?
Use the "show ip interface brief" command to see if an interface is down.
On a Cisco 3504 WLC Summary page ( Advanced > Summary ), which tab allows a network administrator to configure a particular WLAN with a WPA2 policy?
WLANs
What method of wireless authentication is dependent on a RADIUS authentication server?
WPA2 Enterprise
Which wireless encryption method is the most secure?
WPA2 with AES
Default VLAN
all switch ports are assigned to this vlan after initial bootup of the switch
Refer to the exhibit. What are the possible port roles for ports A, B, C, and D in this RSTP-enabled network?
alternate, designated, root, root
Management VLAN
an ip address and subnet mask are assigned to this vlan, allowing the switch to be accessed by HTTP, Telnet, SSH or SNMP
Refer to the exhibit. Based on the exhibited configuration and output, why is VLAN 99 missing?
because VLAN 99 has not yet been created
Which DHCPv4 message will a client send to accept an IPv4 address that is offered by a DHCP server?
broadcast DHCPREQUEST
A company is deploying a wireless network in the distribution facility in a Boston suburb. The warehouse is quite large and it requires multiple access points to be used. Because some of the company devices still operate at 2.4GHz, the network administrator decides to deploy the 802.11g standard. Which channel assignments on the multiple access points will make sure that the wireless channels are not overlapping?
channels 1, 6, and 11
Layer 1 Problem
down/down
What mitigation plan is best for thwarting a DoS attack that is creating a MAC address table overflow?
enable port security
Refer to the exhibit. What will router R1 do with a packet that has a destination IPv6 address of 2001:db8:cafe:5::1?
forward the packet out Serial0/0/0
What is a method to launch a VLAN hopping attack?
introducing a rogue switch and enabling trunking
Which option shows a correctly configured IPv4 default static route?
ip route 0.0.0.0 0.0.0.0 S0/0/0
Refer to the exhibit. Currently router R1 uses an EIGRP route learned from Branch2 to reach the 10.10.0.0/16 network. Which floating static route would create a backup route to the 10.10.0.0/16 network in the event that the link between R1 and Branch2 goes down?
ip route 10.10.0.0 255.255.0.0 209.165.200.225 100
Refer to the exhibit. Which static route would an IT technician enter to create a backup route to the 172.16.1.0 network that is only used if the primary RIP learned route fails?
ip route 172.16.1.0 255.255.255.0 s0/0/0 121
Refer to the exhibit. Which static route command can be entered on R1 to forward traffic to the LAN connected to R2?
ipv6 route 2001:db8:12:10::/64 S0/0/1 fe80::2
A network administrator configures the port security feature on a switch. The security policy specifies that each access port should allow up to two MAC addresses. When the maximum number of MAC addresses is reached, a frame with the unknown source MAC address is dropped and a notification is sent to the syslog server. Which security violation mode should be configured for each access port?
restrict
Which network attack is mitigated by enabling BPDU guard?
rogue switches on a network
What command will enable a router to begin sending messages that allow it to configure a link-local address without using an IPv6 DHCP server?
the ipv6 unicast-routing command
Which information does a switch use to populate the MAC address table?
the source MAC address and the incoming port
Refer to the exhibit. A network administrator configured routers R1 and R2 as part of HSRP group 1. After the routers have been reloaded, a user on Host1 complained of lack of connectivity to the Internet The network administrator issued the show standby brief command on both routers to verify the HSRP operations. In addition, the administrator observed the ARP table on Host1. Which entry should be seen in the ARP table on Host1 in order to gain connectivity to the Internet?
the virtual IP address and the virtual MAC address for the HSRP group 1
A network administrator is configuring a WLAN. Why would the administrator disable the broadcast feature for the SSID?
to eliminate outsiders scanning for available SSIDs in the area
A network administrator is configuring a WLAN. Why would the administrator use RADIUS servers on the network?
to restrict access to the WLAN by authorized, authenticated users only
Layer 2 Problem
up/down
In which situation would a technician use the show interfaces switch command?
when packets are being dropped from a particular directly attached host
After attaching four PCs to the switch ports, configuring the SSID and setting authentication properties for a small office network, a technician successfully tests the connectivity of all PCs that are connected to the switch and WLAN. A firewall is then configured on the device prior to connecting it to the Internet. What type of network device includes all of the described features?
wireless router
After attaching four PCs to the switch ports, configuring the SSID and setting authentication properties for a small office network, a technician successfully tests the connectivity of all PCs that are connected to the switch and WLAN. A firewall is then configured on the device prior to connecting it to the Internet. What type of network device includes all of the described features?v
wireless router
