HomeWork 1-8

Which router bootup sequence is correct?

1 - perform the POST and load the bootstrap program 2 - locate and load the Cisco IOS software 3 - locate and load the startup configuration file or enter setup mode

Your organization is issued the IPv6 prefix of 2001:0000:130F::/48 by your service provider. With this prefix, how many bits are available for your organization to create subnetworks if interface ID bits are not borrowed?

16

What is the default interval in seconds for sending bridge protocol data units?

2

What is the most compressed representation of the IPv6 address 2001:0000:0000:abcd:0000:0000:0000:0001?

2001:0:0:abcd::1

What is the prefix associated with the IPv6 address 2001:CA48:D15:EA:CC44::1/64?

2001:CA48:D15:EA::/64

What is the subnet address for the IPv6 address 2001:D12:AA04:B5::1/64?

2001:D12:AA04:B5::/64

What is the valid most compressed format possible of the IPv6 address 2001:0DB8:0000:AB00:0000:0000:0000:1234?

2001:DB8:0:AB00::1234

How many VLANs can be configured on a Catalyst switch?

4000+

How is a BID made up?

A bridge priority, default 32768, followed by the switch base MAC.

Which statement describes SVIs

A default SVI is created for VLAN 1 for switch administration

What is a multiple frame transmission?

A host receives the same frame several times by different paths.

The marketing department is on VLAN 4 and the sales department is on VLAN 5. How can a member of the marketing department communicate with a member of the sales department?

A router is needed to route packets between different VLANs.

What is the significant difference between a hub and a Layer 2 LAN switch?

A switch creates many smaller collision domains, and a hub increases the size of a single collision domain.

What is the interface ID of the IPv6 address 2001:DB8::1000:A9CD:47FF:FE57:FE94/64?

A9CD:47FF:FE57:FE94

Which statement is true about broadcast and collision domains?

Adding a switch to a network will increase the size of the broadcast domain.

If you do not specify which VLANs are allowed on a trunk link, what will happen?

All VLANs can send traffic over the link.

The network shown in the diagram has just been configured and none of the switches yet has any entries in its bridging table. Workstation A1 sends out a broadcast ARP request. What will happen?

All devices on VLAN 1 will receive the ARP request. Switch A will put the MAC address of workstation A1 into its bridging table

Where is frame tagging removed from the frame?

At a switch, after the frame is received from a trunk connection.

Where is frame tagging added to the frame?

At a switch, before the frame is placed on a trunk connection.

Which commands would you use in order to create a VLAN number 4, called Marketing?

B

What does the term "port density" represent for an Ethernet switch?

B. the number of available ports

Where is frame tagging necessary to identify VLAN membership?

Between switches if a link carries frames belonging to more than one VLAN.

What states does a port go through from the time when a switch first start up to the time when the port is fully operational?

Blocking, listening, learning, forwarding

Which address type is not supported in IPv6?

Broadcast

What is the likely effect on the topology shown if Spanning Tree Protocol has been disabled?

Broadcast storm

Which of the following problems may occur in redundant switched network topologies?

Broadcast storms. MAC address database instability.

Which of the following does a port do in the listening state?

C. Receiving BPDUs D. Sending BPDUs

Another VLAN is added to the network shown above, but the router does not have a spare FastEthernet port. What would be the most economical solution?

Configure a trunk link on the switch and subinterfaces on one of the router ports.

An administrator wants to configure an IP address on a switch so that the switch can be configured remotely. What should the administrator do?

Configure the IP address on the management VLAN.

A network administrator has configured ​VLAN 99 as the management VLAN and has configured it with an IP address and subnet mask. The administrator issues the show interface vlan 99 command and notices that the line protocol is down. Which action can change the state of the line protocol to up?

Connect a host to an interface associated with VLAN 99.

Which switching method makes use of the FCS value?

D. store-and-forward

IEEE 802.1q and ISL are:

Different encapsulation methods for tagging frames on trunk links.

A switch is configured with four VLANs. Which is true?

Each VLAN is a separate subnet and needs its own subnet address. The Switch keeps a separate bridging table for each VLAN. Each VLAN forms its own broadcast domain.

What is true about MAC addresses when "router-on-a-stick" is used for inter-VLAN routing?

Each physical Ethernet interface on the router has one MAC address.

What advantage does SSH offer over Telnet?

Encryption

Which IPv6 network prefix is only intended for local links and can not be routed?

FE80::/10

The server wants to send a message to IP address 192.168.7.5 but it does not know the MAC address of that host. It sends an ARP request. What will switch A do with the ARP request?

Forward it through all ports except the port on which it was received

What will a Cisco LAN switch do if it receives an incoming frame and the destination MAC address is not listed in the MAC address table?

Forward the frame out all ports except the port where the frame is received.

Which two statements are true about half-duplex and full-duplex communications?

Full duplex allows both ends to transmit and receive simultaneously. Full duplex increases the effective bandwidth.

What is indicated by a successful ping to the ::1 IPv6 address?

IP is properly installed on the host

Which statement describes the system LED operation on Cisco Catalyst switches?

If the LED is amber, the system is receiving power but it is not functioning properly.

What is a feature of a tree topology?

It contains no loops

Which statements are true of IEEE 802.1Q frame tagging?

It inserts a VLAN identifier and other fields into the frame header. It is now the preferred method for identifying VLAN traffic between switches.

What is a disadvantage of the spanning tree algorithm?

It takes longer to converge than is desirable.

What is the purpose of the command ping ::1?

It tests the internal configuration of an IPv6 host.

At a minimum, which address is required on IPv6-enabled interfaces?

Link-Local

It can take 20 seconds for a port to move from the blocking to the listening state. What timer controls this interval?

Max-age timer

Which is true of inter-VLAN routing using "router-on-a-stick"?

Not every router is able to create subinterfaces for VLANs. It depends on the IOS features.

What will exist when the spanning tree protocol has worked and the network has converged?

One root bridge per network, one root port per non root bridge, one designated port per segment, non-designated ports.

A router is to be added to the configuration shown in the diagram above. This will allow communication between the different VLANs. How many fast ethernet ports will the router need?

One, since trunking can be used.

How are default gateways configured for inter-VLAN routing when "router-on-a-stick" is used?

PCs on different VLANs must be configured with different default gateways.

In rapid spanning tree protocol, which link types allow ports to move immediately to forwarding mode?

Point-to-point Edge type

Ports 0/7, 0/8 and 0/9 all belong to VLAN 4. You give the commands:

Port 0/9 is reassigned to VLAN 1

Which of the following does a port do in the blocking state?

Processes BPDUs Receiving BPDUs

Which tasks can be accomplished by using the command history feature? (Choose two.)

Recall previously entered commands Set the command history buffer size

What information is contained in a bridge protocol data unit?

Root BID, route path cost, sender BID, port ID

Which is the correct order of the stages carried out by the spanning tree protocol?

Select a root bridge, select a root port on each non-root bridge, select a designated port on each segment, block any remaining (non-designated) ports.

A router-on-a-stick is configured as follows: R(config)#interface f0/1.2R(config-subif)#encapsulation dot1q 20R(config-subif)#ip add 172.18.0.1 255.255.255.128R(config-subif)#interface f0/1.3R(config-subif)#encapsulation dot1q 30R(config-subif)#ip add 172.18.0.161 255.255.255.224R(config-subif)#interface f0/1.4R(config-subif)#encapsulation dot1q 40R(config-subif)#ip add 172.18.0.193 255.255.255.224R(config-subif)# interface f0/1R(config-if)#no shutdown The router receives a frame on physical interface f0/1. The destination IP address is 172.18.0.120. What will the router do?

Send the frame out of interface f0/1.2 tagged for VLAN 20.

Which of the following does a port do in the learning state?

Sending BPDUs Learning MAC addresses. Receiving BPDUs

Which command would you give to view the contents of the VLAN database?

Switch#show vlan

Which commands would you use in order to assign the fast ethernet port 0/7 to VLAN 4?

Switch(config-if)#switchport mode access Switch(config)#interface fastethernet 0/7 Switch(config-if)#switchport access vlan 4

You have configured static VLANs on a switch. The marketing department uses VLAN 4. A member of the marketing department moves to a different office, taking her PC with her. What needs to be done?

The Switch configuration must be altered so that the port connected to the PC is reassigned to VLAN 4.

A trunk link between a router and a switch is carrying traffic for six VLANs. What is a potential problem?

The VLANs are sharing the link's bandwidth and this could create a bottleneck.

A switch port has been configured as follows: SW1(config)#int fa 0/12 SW1(config-if)#mls qos trust cos SW1(config-if)#switchport voice vlan 150 SW1(config-if)#switchport mode access SW1(config-if)#switchport access vlan 5 SW1(config-if)#end Which is true?

The port can handle both voice and data traffic.

A switch has static VLANs configured. Three workstations are connected to the same Switch port by using a hub. What is the effect of this?

The three workstations must be on the same VLAN

What is the listening forward delay?

The time a port spends in listening mode while the network is converging

A new switch has the default configuration. Which of the following are true?

There may be default VLANs for different LAN technologies, such as token Ring and FDDI. VLAN 1 exists, and all ethernet ports are assigned to it

How do switches choose a root bridge?

They choose the switch with the lowest BID.

What is the purpose of frame buffers on a switch?

They hold traffic, thus alleviating network congestion.

What will happen to user data frames while the network is converging?

They will be discarded.

What is the problem with the network in the diagram?

This design will not scale well if more VLANs are added.

How many IP addresses must be configured on the router mentioned in the previous question?

Three, one for each VLAN.

What is the purpose of the spanning tree algorithm?

To create a loop-free topology.

Why might a network administrator change a switch priority to a higher value than that of other switches in the network?

To make sure that the switch is not chosen as the root bridge.

What is a proposed solution to get rid of this disadvantage?

Use rapid spanning tree protocol.

Which VLAN is used for STP and CDP messages?

VLAN 1

Ports 0/7, 0/8 and 0/9 all belong to VLAN 4. You give the command:

VLAN 4 has been deleted. All three ports are inactive and not assigned to any VLAN.

Which is true about VLAN information?

VLAN information is held in the VLAN database in flash memory.

Which is true of a dynamic VLAN?

VLAN membership depends on the MAC address of the workstation.

Which is true of a static VLAN?

VLAN membership depends on the Switch port to which the workstation is connected.

What are three parts of an IPv6 global unicast address? (Choose three.)

a global routing prefix that is used to identify the network portion of the address that has been provided by an ISP a subnet ID that is used to identify networks inside of the local enterprise site an interface ID that is used to identify the local host on the network

What is required to perform router-on-a-stick inter-VLAN routing?

a router that is configured with multiple subinterfaces

What type of Ethernet cable would be used to connect one switch to another switch when neither switch supports the auto-MDIX feature?

crossover

What is one function of a Layer 2 switch?

determines which interface is used to forward a frame based on the destination MAC address

Which switch characteristic helps alleviate network congestion when a 10 Gbps port is forwarding data to a 1 Gbps port?

frame buffering

What type of address is automatically assigned to an interface when IPv6 is enabled on that interface?

link-local

Which type of IPv6 address is not routable and used only for communication on a single subnet?

link-local address

1/1 What is the first action in the boot sequence when a switch is powered on?

load a power-on self-test program

What must an administrator have in order to reset a lost password on a router?

physical access to the router

Which network device can serve as a boundary to divide a Layer 2 broadcast domain?

router

Which command will provide information about the status of all interfaces including the number of giants, runts, and collisions on the interface?

show interfaces

An administrator was troubleshooting a router-on-a-stick topology and concluded that the problem was related to the configuration of VLANs on the router subinterfaces. Which two commands can the administrator use in the router to identify the problem?

show running-config show ip interface

Which type of address does a switch use to build the MAC address table?

source MAC address

Which option correctly describes a switching method?

store-and-forward: ensures that the frame is free of physical and data-link errors

Which network device can be used to eliminate collisions on an Ethernet network?

switch

Which prompt is displayed when a network administrator successfully accesses the boot loader on a switch to recover from a system crash?

switch:

Which information does a switch use to keep the MAC address table information current?

the source MAC address and the incoming port

What is the minimum configuration for a router interface that is participating in IPv6 routing?

to have only a link-local IPv6 address

How long can it take for a network using spanning tree topology to converge again after a topology change?

up to 50 seconds

When configuring a switch for SSH access, what other command that is associated with the login local command is required to be entered on the switch

username username secret secret