CCNA 2 midterm
The address pool of a DHCP server is configured with 10.19.44.0/24. The network administrator reserves 3 IP addresses for servers. How many IP addresses are left in the pool to be assigned to other hosts?
251
A small company network has six interconnected Layer 2 switches. Currently all switches are using the default bridge priority value. Which value can be used to configure the bridge priority of one of the switches to ensure that it becomes the root bridge in this design?
28672
Which spanning tree standard supports only one root bridge so that traffic from all VLANs flows over the same path?
802.1D
A set of switches is being connected in a LAN topology. Which STP bridge priority value will make it least likely for the switch to be selected as the root?
61440
A company uses DHCP to manage IP address deployment for employee workstations. The IT department deploys multiple DHCP servers in the data center and uses DHCP relay agents to facilitate the DHCP requests from workstations. Which two UDP ports are used to forward DHCP traffic? (Choose two.)
67 68
How do switch buffers affect network performance?
They store frames received, thus preventing premature frame discarding when network congestion occurs.
A network administrator issues the show vlan brief command while troubleshooting a user support ticket. What output will be displayed?
the VLAN assignment and membership for all switch ports
Which four steps are needed to configure a voice VLAN on a switch port? (Choose four).
1.Assign the voice VLAN to the switch port. 2.Ensure that voice traffic is trusted and tagged with a CoS priority value. 3.Add a voice VLAN. 4.Configure the switch port in access mode
1. What is the purpose of the Spanning Tree Protocol (STP)? 2. What is the function of STP in a scalable network?
1.prevents Layer 2 loops 2.It disables redundant paths to eliminate Layer 2 loops.
The address pool DHCP server is configured with 10.92.71.0/25. the net
118
A high school uses VLAN15 for the laboratory network and VLAN30 for the faculty network. What is required to enable communication between these two VLANs while using the router-on-a-stick approach?
A switch with a port that is configured as a trunk is needed when connecting to the router
What are two requirements to be able to configure an EtherChannel between two switches? (Choose two.)
All the interfaces need to work at the same speed. All the interfaces need to be working in the same duplex mode.
What are two advantages of EtherChannel? (Choose two.)
Configuring the EtherChannel interface provides consistency in the configuration of the physical links. Spanning Tree Protocol views the physical links in an EtherChannel as one logical connection.
Which protocol automates assignment of IP addresses on a network, and which port number does it use? (Choose two.)
DHCP 67
A host PC is attempting to lease an address through DHCP. What message is sent by the server to let the client know it is able to use the provided IP information?
DHCPACK
A company uses DHCP servers to dynamically assign IPv4 addresses to employee workstations. The address lease duration is set as 5 days. An employee returns to the office after an absence of one week. When the employee boots the workstation, it sends a message to obtain an IP address. Which Layer 2 and Layer 3 destination addresses will the message contain?
FF-FF-FF-FF-FF-FF and 255.255.255.255
Open the PT Activity. Perform the tasks in the activity instructions and then answer the question. Which message is displayed when 10.10.10.1 is entered into the PC1 Web Browser address bar?
File Server
Which statement is correct about Ethernet switch frame forwarding decisions?
Frame forwarding decisions are based on MAC address and port mappings in the CAM table.
Which FHRP implementation is a Cisco-proprietary protocol that suppports IPv4 load sharing?
GLBP
A network administrator is analyzing the features that are supported by different first-hop router redundancy protocols. Which statement describes a feature that is associated with HSRP?
HSRP uses active and standby routers.
What are two advantages of using LACP? (Choose two.)
It allows directly connected switches to negotiate an EtherChannel link. It allows the use of multivendor devices.
A technician is configuring a new Cisco 2960 switch. What is the effect of issuing the BranchSw(config-if)# mdix auto command?
It automatically adjusts the port to allow device connections to use either a straight-through or a crossover cable.
What is an advantage of configuring a Cisco router as a relay agent?
It can provide relay services for multiple UDP services.
A technician is configuring a new Cisco 2960 switch. What is the effect of issuing the BranchSw> enable command?
It enters privileged mode.
Which statement is true regarding the use of PAgP to create EtherChannels?
It is Cisco proprietary
What is a characteristic of an IPv4 loopback interface on a Cisco IOS router?
It is a logical interface internal to the router.
What is a characteristic of spanning tree?
It is enabled by default on Cisco switches.
Which statement describes a characteristic of EtherChannel?
It is made by combining multiple physical links that are seen as one link between two switches
Which technology is an open protocol standard that allows switches to automatically bundle physical ports into a single logical link?
LACP
Which protocol provides up to 16 instances of RSTP, combines many VLANs with the same physical and logical topology into a common RSTP instance, and provides support for PortFast, BPDU guard, BPDU filter, root guard, and loop guard?
MST
What is the outcome of a Layer 2 broadcast storm?
New traffic is discarded by the switch because it is unable to be processed.
A network contains multiple VLANs spanning multiple switches. What happens when a device in VLAN 20 sends a broadcast Ethernet frame?
Only devices in VLAN 20 see the frame.
Port Fa0/11 on a switch is assigned to VLAN 30. If the command no switchport access vlan 30 is entered on the Fa0/11 interface, what will happen?
Port Fa0/11 will be returned to VLAN 1.
A company uses the method SLAAC to configure IPv6 addresses for the workstations of the employees. A network administrator configured the IPv6 address on the LAN interface of the router. The interface status is UP. However, the workstations on the LAN segment did not obtain the correct prefix and prefix length. What else should be configured on the router that is attached to the LAN segment for the workstations to obtain the information?
R1(config)# ipv6 unicast-routing
Which protocol adds security to remote connections?
SSH
Which mode configuration setting would allow formation of an EtherChannel link between switches SW1 and SW2 without sending negotiation traffic?
SW1: on SW2: on
A network administrator is configuring an EtherChannel link between switches SW1 and SW2 by using the command SW1(config-if-range)# channel-group 1 mode auto . Which command must be used on SW2 to enable this EtherChannel?
SW2(config-if-range)# channel-group 1 mode desirable
Which two statements are correct with respect to SVI inter-VLAN routing? (Choose two.)
Switching packets is faster with SVI. There is no need for a connection to a router.
A network administrator has configured an EtherChannel between two switches that are connected via four trunk links. If the physical interface for one of the trunk links changes to a down state, what happens to the EtherChannel?
The EtherChannel will remain functional.
What are two drawbacks to turning spanning tree off and having multiple paths through the Layer 2 switch network? (Choose two.)
The MAC address table becomes unstable. Broadcast frames are transmitted indefinitely.
What is a requirement to configure a trunking EtherChannel between two switches?
The allowed range of VLANs must be the same on both switches.
What is one indication that a Windows computer did not receive an IPv4 address from a DHCP server?
The computer receives an IP address that starts with 169.254.
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 unigue
What happens to switch ports after the VLAN to which they are assigned is deleted?
The ports stop communicating with the attached devices.
Which FHRP implementation is a nonproprietary IPv4-only election protocol which has one master router per group?
VRRPv2
Which statement is true about DHCP operation?
When a device that is configured to use DHCP boots, the client broadcasts a DHCPDISCOVER message to identify any available DHCP servers on the network.
What is a result when the DHCP servers are not operational in a network?
Workstations are assigned with IP addresses in the 169.
Match each DHCP message type with its description. (Not all options are used.)
a client initiating a message to find a DHCP server - DHCPDISCOVER a DHCP server responding to the initial request by a client - DHCPOFFER the client accepting the IP address provided by the DHCP server - DHCPREQUEST the DHCP server confirming that the lease has been accepted - DHCPACK
Which solution would help a college alleviate network congestion due to collisions?
a high port density switch
Which DHCPv4 message will a client send to accept an IPv4 address that is offered by a DHCP server?
broadcast DHCPREQUEST
What type of VLAN should not carry voice and network management traffic?
data VLAN
When the show spanning-tree vlan 33 command is issued on a switch, three ports are shown in the forwarding state. In which two port roles could these interfaces function while in the forwarding state? (Choose two.)
designated root
Which two channel group modes would place an interface in a negotiating state using PAgP? (Choose two.)
desirable auto
What is the reason that an ISP commonly assigns a DHCP address to a wireless router in a SOHO environment?
easy IP address management
A switch is configured to run STP. What term describes a field used to specify a VLAN ID?
extended system ID
Which three components are combined to form a bridge ID?
extended system ID MAC address bridge priority
In which two port states does a switch learn MAC addresses and process BPDUs in a PVST network? (Choose two.)
forwarding learning
In which two PVST+ port states are MAC addresses learned? (Choose two.)
forwarding learning
What is the result of a network technician issuing the command ip dhcp excluded-address 10.0.15.1 10.0.15.15 on a Cisco router?
he Cisco router will exclude 15 IP addresses from being leased to DHCP clients.
Which switch characteristic helps keep traffic local and alleviates network congestion?
high port density
Open the PT Activity. Perform the tasks in the activity instructions and then answer the question. Which set of configuration commands issued on SW1 will successfully complete the EtherChannel link between SW1 and SW2?
interface GigabitEthernet0/1 channel-group 1 mode desirable
Which set of commands will configure a router as a DHCP server that will assign IPv4 addresses to the 192.168.100.0/23 LAN while reserving the first 10 and the last addresses for static assignment?
ip dhcp excluded-address 192.168.100.1 192.168.100.10ip dhcp excluded-address 192.168.101.254ip dhcp pool LAN-POOL-100network 192.168.100.0 255.2 default-router 192.168.100.1
If no bridge priority is configured in PVST, which criteria is considered when electing the root bridge?
lowest MAC address
What type of VLAN is configured specifically for network traffic such as SSH, Telnet, HTTPS, HHTP, and SNMP?
management VLAN
Which type of VLAN is used to designate which traffic is untagged when crossing a trunk port?
native
When EtherChannel is configured, which mode will force an interface into a port channel without exchanging aggregation protocol packets?
on
Match the DHCP message types to the order of the DHCPv4 process. (Not all options are used.)
step 1 dhcpdiscover step2 dhcpoffer step 3 dhcprequest step 4 dhcpack
What is the value used to determine which port on a non-root bridge will become a root port in a STP network?
the path cost
What information can be verified through the show ip dhcp binding command?
the IPv4 addresses that are assigned to hosts by the DHCP server
A company uses the SLAAC method to configure IPv6 addresses for the employee workstations. Which address will a client use as its default gateway?
the link-local address of the router interface that is attached to the network
What is a characteristic of a routed port on a Layer 3 switch?
It is not assigned to a VLAN.
Which statement describes HSRP?
It is used within a group of routers for selecting an active device and a standby device to provide gateway services to a LAN.
A network administrator configures a router to send RA messages with M flag as 0 and O flag as 1. Which statement describes the effect of this configuration when a PC tries to configure its IPv6 address
It should use the information that is contained in the RA message and contact a DHCPv6 server for additional information.
Which command is used to set the BOOT environment variable that defines where to find the IOS image file on a switch?
boot system
Which command, when issued in the interface configuration mode of a router, enables the interface to acquire an IPv4 address automatically from an ISP, when that link to the ISP is enabled?
ip address dhcp
A switch is configured to run STP. What term describes the reference point for all path calculations?
root bridge
Which port role is assigned to the switch port that has the lowest cost to reach the root bridge
root port
What are two load-balancing methods in the EtherChannel technology? (Choose two.)
source IP to destination IP source MAC to destination MAC
Which two parameters must match on the ports of two switches to create a PAgP EtherChannel between the switches? (Choose two.)
speed VLAN information