LAN Switching Fundamentals Flashcards
What are three configuration modes for the switchport port-security violation command?
shutdown, restrict, and protect
Which Cisco Internetwork Operating System (IOS) command is used to enter the VLAN configuration mode?
the vlan database command
What would be the transmission mode if two Cisco devices have their NIC speed configured to AUTO mode?
Full Duplex
What Cisco Internetwork Operating System (IOS) command will be used to create a VLAN named Sales with a VLAN number of 25?
the vlan 25 name Sales command
Which InterVLAN protocol is used to provide connectivity between VLANs?
IEEE 802.10 protocol
Which enhancement of Cisco Discovery Protocol (CDP) allows CDP to advertise a connected IP prefix for the stub router?
On-Demand Routing (ODR)
Which Cisco IOS show command will display CDP information regarding a particular neighboring device?
the show cdp entry command
What type of communication occurs when a host sends a frame to all host machines on the Ethernet LAN segment?
broadcast
What are the two states a switch port must transit from blocking to forwarding during normal operation of Spanning Tree Protocol (STP)?
listening and learning
What Cisco Internetwork Operating System (IOS) command will set a VLAN Trunking Protocol (VTP) domain named Sales?
the vtp domain Sales command
What is the default interval used by Cisco Discovery Protocol (CDP) to send updates?
60 seconds
In which type of internal switching process does a frame experience maximum latency?
store and forward
What is the default status of CDP on a Cisco device?
CDP is enabled by default
Which Cisco IOS Discovery Protocol (CDP) show command will display the IP address of the connected device?
the show cdp neighbors detail privileged EXEC mode command
Which VLAN Trunking Protocol (VTP) mode does not save VLAN information in non-volatile RAM (NVRAM)?
VTP Client mode
Which Cisco Internetwork Operating System (IOS) command is used to display VLAN Trunking Protocol (VTP) domain information?
the show vtp domain command
Which multicast feature in a switch helps control the multicasts?
Internet Group Management Protocol (IGMP)
What type of communication occurs when a host sends a frame to any specific host on the LAN?
Unicast
What is the default configuration mode for the switchport port-security violation command if none is specified?
shutdown
Which protocol enables hosts on a LAN segment to determine the MAC address of hosts with known IP addresses?
Address Resolution Protocol (ARP)
How does a standalone switch treat a multicast frame?
The switch will forward the packet to all ports except the port on which it was received.
Which Cisco IOS command is used to reset Cisco Discovery Protocol (CDP) traffic counters to zero?
the clear cdp counters privileged EXEC command
Which Virtual Local Area Network (VLAN) frame tagging method does not modify Ethernet frames?
Inter-Switch Link (ISL)
Which Cisco Internetwork Operating System (IOS) command is used to view information regarding the spanning tree for a particular VLAN?
the show spanning-tree vlan vlan-id command
Which enhancement of Cisco Discovery Protocol (CDP) allows CDP to carry Variable Length Subnet Masking (VLSM) information?
On-Demand Routing (ODR)
Which Protocol is used to obtain the IP address for a machine based on the MAC address?
Reverse Address Resolution Protocol (RARP)
Which connection types can carry frames for multiple VLANs?
Trunk connections
What is the default time a port takes to transit from blocking through forwarding during normal operation of Spanning Tree Protocol (STP)?
50 seconds
What do switches use for Local Area Network (LAN) segmentation?
virtual LANs (VLANs)
How many collision domains does a 12-port switch create?
12
What is the broadcast MAC address for Ethernet as defined by IEEE?
FFFF.FFFF.FFFF
Which Cisco Internetwork Operating System (IOS) command is used to view VLAN Trunking Protocol (VTP) statistics information?
the show vtp counters command
What type of communication occurs when a host sends a frame to select few host machines on the Ethernet LAN segment?
Multicast
How many collision domains does a 12-port hub create?
One
Which Cisco IOS command is used to configure the frequency at which the Cisco IOS software sends Cisco Discovery Protocol (CDP) updates?
the cdp timer global configuration command
Which Cisco Discovery Protocol (CDP) feature allows CDP to include routing information in its periodic update messages to neighboring devices?
On-Demand Routing (ODR)
Which Cisco IOS CDP show command displays the interface on which Cisco Discovery Protocol is enabled?
the show cdp interface privileged EXEC mode command
Which port on the switch connects to a 10BaseT port on a hub using a crossover cable?
the 10/100 Ethernet port
What are the five port states that Spanning Tree Protocol (STP) uses to define port status on a switch?
Forwarding, blocking, listening, learning, and disabled
What is the default CDP hold time?
180 seconds
Which System LED color indicates that a switch is operating normally?
Green
Which protocol ensures that only one active path exists between any two LAN segments by enabling specific ports and blocking others?
Spanning Tree Protocol (STP)
Which type of switching process allows switch to perform address lookup and forward the frame as soon as the destination address field in the frame header is received?
cut-through
Which type of VLAN frames are not tagged while traversing over a trunk link?
Native VLAN frames
Which Cisco Internetwork Operating System (IOS) command is used to view the list of trunk ports and VLAN frame tagging methods configured for ports?
the show interface trunk command
Which Cisco Internetwork Operating System (IOS) command will display the spanning tree information for VLAN 1?
the show spantree 1 command
Which Cisco IOS show command can be used to identity all interfaces enabled for CDP?
the show running-configuration command
Which type of VLAN allows the switch to automatically assign a switch port to a VLAN based on information from the user’s machine, such as its Media Access Control (MAC) address or IP address?
Dynamic VLANs
Which Layer 2 network devices forward frames based on a MAC address table which is dynamically populated as the device learns new MAC addresses?
switches
Which industry standard multiple VLAN protocol is used to connect multiple switches and routers?
IEEE 802.1Q protocol
In which type of internal switching process does a frame experience latency greater than cut-through but less than store forward internal switching?
Fragment-free
Which protocol does a switch use in order to create a loop-free environment?
Spanning Tree Protocol (STP)
Which Cisco IOS CDP show command can be used to verify whether CDP is enabled on a particular device?
the show cdp neighbors command
Which Cisco Internetwork Operating System (IOS) command is used on a Catalyst 2950 series switch to enable basic port security on an interface?
the switchport port-security command
Which Cisco IOS command is used to enable the Cisco Discovery Protocol (CDP) on a Cisco device?
the cdp run global configuration command
Which multicast destination MAC address is used by Cisco Discovery Protocol (CDP) to make announcements?
01-00-0c-cc-cc-cc
What is the default status of CDP version 2 advertisements on a Cisco device?
CDP version 2 advertisements are enabled by default
What type of communication occurs when a host’s Network Interface Card (NIC) sends and receives frames simultaneously?
Full-Duplex
What are the four port mode LEDs available on a Cisco Catalyst switch?
stat, util, duplex, and speed
Which protocol is used to resolve MAC address to IP address mappings?
Address Resolution Protocol (ARP)
Which term defines a LAN segment where frames of a group of NICs can collide with each other?
Collision domain
Which Cisco IOS command is used to enable Cisco Discovery Protocol (CDP) on an interface?
the cdp enable interface configuration command
What command would be used to enable a port for VLAN 15 in access link mode?
the Switch(config-if)#switchport access vlan 15 command
What type of communication occurs when a host’s Network Interface Card (NIC) sends or receives frames one at a time?
Half-Duplex
Which Virtual Local Area Network (VLAN) frame tagging method adds a 4-byte tag in the middle of the original Ethernet frame?
IEEE 802.1Q
Which Cisco Internetwork Operating System (IOS) command is used on a Catalyst 2950 series switch to view the VLAN database?
the show vlan brief command
Which type of switching process allows switch to verify the Frame Check Sequence (FCS) of a frame before forwarding it to the destination port?
store and forward
What are the three general categories of MAC addresses on Ethernet as defined by the IEEE?
Unicast, Broadcast, and Multicast
Which Cisco Internetwork Operating System (IOS) command is used to view the VLAN number, name, status and ports assigned to individual VLANs?
the show vlan command
Which Cisco Internetwork Operating System (IOS) command is used to view the configuration for port security?
the show port security command
Which algorithm is used in Carrier Sense Multiple Access/Collision Detection (CSMA/CD) to calculate the random length of time for which a station should wait before transmitting the frames when a collision occurs?
the back-off algorithm
On the basis of which address does a switch make forwarding and filtering decisions?
Media Access Control (MAC) address
Which show command is used to display the status of port security on the specified interface of a Catalyst switch?
The show port-security [interface interface-id | address] command
What are the three actions performed by transparent bridges?
Learn MAC address by examining the source address of each frame, decide whether to forward the frame or filter it out, and to create a loop-free environment by using STP
Which Cisco proprietary protocol can be used for trunking between two VLAN capable Ethernet, fast Ethernet, or gigabit Ethernet devices?
Inter-Switch Link Protocol (ISL)
Which address does a switch use to forward frames to the destination?
a Media Access Control (MAC) address
Which Cisco IOS command is used to display information about a specific neighboring device discovered using Cisco Discovery Protocol (CDP)?
the show cdp entry{* | device-name [*] [protocol | version]} privileged EXEC mode command
Which feature of Cisco VLAN Trunking Protocol (VTP) will allow switches to dynamically delete or add VLANs to a trunk?
VLAN Trunking Protocol (VTP) pruning
Which Cat OS command is used to enable port security on a Catalyst 6500 series switch?
the set port-security command
Which Cisco IOS command is used to clear the table that contains Cisco Discovery Protocol (CDP) information about neighboring devices?
the clear cdp table privileged EXEC command
Which Cisco IOS show command will display information on globally configured Cisco Discovery Protocol (CDP) parameters on a Cisco device?
the show cdp command
How does a standalone switch treat a broadcast frame?
The switch will forward the packet to all ports except the port on which it was received.
What are the three types of switching processes?
Store and forward, cut-through, and fragment-free switching
Which Cisco Internetwork Operating System (IOS) command displays all port security settings for a specified interface?
the show port-security interface-id command
Which type of switching process only waits to receive the first 64 bytes of the frame before forwarding it the destination port?
Fragment-free
Which Cisco Internetwork Operating System (IOS) command is used to verify the status of VLAN Trunking Protocol (VTP) protocol?
the show vtp status command
Which type of switching process requires switch to wait until the entire frame is received before forwarding it to the destination port?
store and forward
In which type of internal switching process does a frame experience minimum latency?
cut-through
Which Cisco IOS command would display information collected by Cisco Discovery Protocol (CDP) about traffic details between devices?
the show cdp traffic privileged EXEC mode command
How does a standalone switch treat a Unicast frame for which it could not find any mapping in the switch MAC table?
The switch will forward the packet to all ports except the port on which it was received.
Which mechanism allows two connected network devices to choose common transmission speed or duplex mode?
Autonegotiation
How many broadcast domains does a 4-port hub create?
One
Which Virtual Local Area Network (VLAN) frame tagging method has a concept of native VLAN?
IEEE 802.1Q
Which type of switching process does NOT allow switch to verify the Frame Check Sequence (FCS) in a frame before forwarding it to the destination port?
cut-through
What would be the destination MAC address for a host sending a packet to another host across a router?
the MAC address of the router
Which Cisco IOS command is used to enable the Cisco Discovery Protocol Version 2 (CDPv2) advertising feature on a Cisco device?
the cdp advertise-v2 global configuration command
How many broadcast domains does a 24-port switch create with two VLANs having 12 port assigned to each?
two
Which Cisco proprietary protocol operates at OSI Layer 2 but is capable of obtaining OSI Layer 3 IP address information for directly connected neighboring devices?
Cisco Discovery Protocol (CDP)
Which Cisco IOS command is used to configure the amount of time the receiving Cisco device should hold a Cisco Discovery Protocol (CDP) packet from a neighboring router?
the cdp holdtime global configuration command
Which term defines a LAN segment where broadcast from one NIC can be received by all other NICs on the segment?
Broadcast domain
Which protocol allows switches to eliminate network-loops?
Spanning Tree Protocol (STP)
At which OSI layer does the Cisco Discovery Protocol (CDP) operate?
Layer 2
Which method is used to identify frames from different VLANs?
Frame tagging
Which VLAN Trunking Protocol (VTP) mode allows a switch to synchronize the VLAN information with the domain, send and forward advertisements, and create, delete, or modify VLANs?
Server mode
Which protocol defines the media access control mechanism in which the transmitting station waits for a random time interval before transmitting a frame when there is a collision?
Carrier Sense Multiple Access/Collision Detection (CSMA/CD)
How many broadcast domains does a 24-port switch, without VLAN configured, create?
one
Which internal switching process works on the premise that collisions are detected within the first 64 bytes of a frame?
Fragment-Free
Which type of Ethernet cable is used to connect the 10/100 port on the switch to another switch?
a crossover cable
