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2021 Sep cisco 642-813 study guide:
Q71. DRAG DROP
Drop
Answer:
Q72. Refer to the exhibit and the partial configuration on routers R1 and R2.
HSRP is configured on the network to provide network redundancy for the IP traffic. The network administrator noticed that R2 does not become active when the R1 serial0 interface goes down. What should be changed in the configuration to fix the problem?
A. R2 should be configured with an HSRP virtual address.
B. R2 should be configured with a standby priority of 100.
C. The Serial0 interface on router R2 should be configured with a decrement value of 20.
D. The Serial0 interface on router R1 should be configured with a decrement value of 20.
Answer: D
Q73. Which statement about 802.1x port-based authentication is true?
A. Hosts are required to have an 802.1x authentication client or utilize PPPoE.
B. Before transmitting data, an 802.1x host must determine the authorization state of the switch.
C. RADIUS is the only supported authentication server type.
D. If a host initiates the authentication process and does not receive a response, it assumes it is not authorized.
Answer: C
Q74. Refer to the exhibit.
Which three statements are true? (Choose three.)
A. A trunk link will be formed.
B. Only VLANs 1-1001 will travel across the trunk link.
C. The native VLAN for switch B is VLAN 1.
D. DTP is not running on switch A.
E. DTP packets are sent from switch B.
Answer: ACE
Q75. HOTSPOT
If GigabitEthernet1/0/1 on DSW2 is shut down, what will be the resulting priority value of the VLAN 105 HSRP group on router DSW2?
A. 90
B. 100
C. 150
D. 200
Answer: A
Up to the minute passguide 642-813:
Q76. Refer to the exhibit.
GLBP has been configured on the network. When the interface serial0/0/1 on router R1 goes down, how is the traffic coming from Host1 handled?
A. The traffic coming from Host1 and Host2 is forwarded through router R2 with no disruption.
B. The traffic coming from Host2 is forwarded through router R2 with no disruption. Host1 sends an ARP request to resolve the MAC address for the new virtual gateway.
C. The traffic coming from both hosts is temporarily interrupted while the switchover to make R2 active occurs.
D. The traffic coming from Host2 is forwarded through router R2 with no disruption. The traffic from Host1 is dropped due to the disruption of the load balancing feature configured for the GLBP group.
Answer: A
Q77. When configuring port security on a Cisco Catalyst switch port, what is the default action taken by the switch if a violation occurs?
A. protect (drop packets with unknown source addresses)
B. restrict (increment SecurityViolation counter)
C. shut down (access or trunk port)
D. transition (the access port to a trunking port)
Answer: C
Q78. CORRECT TEXT
Refer to the Exhibit.
The information of the question
You will configure FastEthernet ports 0/12 through 0/24 for users who belong to VLAN 20. Also, all VLAN and VTP configurations are to be completed in global configuration mode as VLAN database mode is being deprecated by Cisco. You are required to accomplish the following tasks:
1. Ensure the switch does not participate in VTP but forwards VTP advertisements received on trunk ports.
2. Ensure all non-trunking interfaces (Fa0/1 to Fa0/24) transition immediately to the forwarding state of Spanning-Tree.
3. Ensure all FastEthernet interfaces are in a permanent non-trunking mode.
4. Place FastEthernet interfaces 0/12 through 0/24 in VLAN 20
Answer: switch#conf t
switch(config)#vtp mode transparent
switch(config)#interface range fa0/1 - 24
switch(config-if-range)#switchport mode access
switch(config-if-range)#spanning-tree portfast
switch(config)#interface range fa0/12 - 24
switch(config-if-range)#switchport access vlan 20
switch(config-if-range)#end
switch# copy run start
VTP:
The role of the VLAN Trunking Protocol (VTP) is to maintain VLAN configuration consistency across the entire network. VTP is a messaging protocol that uses Layer 2 trunk frames to manage the addition, deletion, and renaming of VLANs on a network-wide basis from a centralized switch that is in the VTP server mode. VTP is responsible for synchronizing VLAN information within a VTP domain. This reduces the need to configure the same VLAN information on each switch. VTP minimizes the possible configuration inconsistencies that arise when changes are made. These inconsistencies can result in security violations, because VLANs can crossconnect when duplicate names are used. They also could become internally disconnected when they are mapped from one LAN type to another, for example, Ethernet to ATM LANE ELANs or FDDI 802.10 VLANs. VTP provides a mapping scheme that enables seamless trunking within a network employing mixed-media technologies.
VTP provides the following benefits:
VLAN configuration consistency across the network
Mapping scheme that allows a VLAN to be trunked over mixed media Accurate tracking and monitoring of VLANs
Dynamic reporting of added VLANs across the network
Plug-and-play configuration when adding new VLANs
There are three different VTP modes:
1. Server:
By default, a Catalyst switch is in the VTP server mode and in the "no management domain" state until the switch receives an advertisement for a domain over a trunk link or a VLAN management domain is configured. A switch that has been put in VTP server mode and had a domain name specified can create, modify, and delete VLANs. VTP servers can also specify other configuration parameters such as VTP version and VTP pruning for the entire VTP domain. VTP information is stored in NVRAM.
VTP servers advertise their VLAN configuration to other switches in the same VTP domain, and synchronize the VLAN configuration with other switches based on advertisements received over trunk links. When a change is made to the VLAN configuration on a VTP server, the change is propagated to all switches in the VTP domain. VTP advertisements are transmitted out all trunk connections, including ISL, IEEE 802.1Q, IEEE 802.10, and ATM LANE trunks.
2. Client:
The VTP client maintains a full list of all VLANs within the VTP domain, but it does not store the information in NVRAM. VTP clients behave the same way as VTP servers, but it is not possible to create, change, or delete VLANs on a VTP client. Any changes made must be received from a VTP server advertisement.
3. Transparent
VTP transparent switches do not participate in VTP. A VTP transparent switch does not advertise its VLAN configuration, and does not synchronize its VLAN configuration based on received advertisements. However, in VTP Version 2, transparent switches do forward VTP advertisements that the switches receive out their trunk ports. VLANs can be configured on a switch in the VTP transparent mode, but the information is local to the switch (VLAN information is not propagated to other switches) and is stored in NVRAM.
To change the VTP mode:
Switch(Config)# vtp mode <Mode>
Or
Switch#vlan database
Switch#vtp <mode>
PortFast
A prime reason for enabling PortFast is in cases where a PC boots in a period less than the 30 seconds it takes a switch to put a port into forwarding mode from disconnected state. Some NICs do not enable a link until the MAC layer software driver is actually loaded. Most operating systems try to use the network almost immediately after loading the driver, as in the case of DHCP. This can create a problem because the 30 seconds of STP delay from listening to Forwarding states begins right when the IOS begins trying to access the network. In the case of DHCP, the PC will not obtain a valid IP address from the DHCP server. This problem is common with PC Card (PCMCIA) NICs used in laptop computers. Additionally, there is a race between operating systems and CPU manufacturers. CPU manufacturers keep making the chips faster, while at the same time, operating systems keep slowing down, but the chips are speeding up at a greater rate than the operating systems are slowing down. As a result, PCs are booting faster than ever. In fact, modern machines are often finished booting and need to use the network before the STP 30- second delay is over.
Use the spanning-tree portfast global configuration command to globally enable the PortFast feature on all non-trunking ports.
Q79. When creating a network security solution, which two pieces of information should you have obtained previously to assist in designing the solution? (Choose two.)
A. a list of existing network applications currently in use on the network
B. network audit results to uncover any potential security holes
C. a planned Layer 2 design solution
D. a proof-of-concept plan
E. device configuration templates
Answer: AB
Q80. Refer to the exhibit.
What does the command channel-group 1 mode desirable do?
A. enables LACP unconditionally
B. enables PAgP only if a PAgP device is detected
C. enables PAgP unconditionally
D. enables EtherChannel only
E. enables LACP only if an LACP device is detected
Answer: C