640-802 - CCNA - Cisco Certified Network Associate Exam
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Which command enhances the 802.1D convergence time on ports that are connected to hosts?
A switch has been configured with two VLANs and is connected to a router with a trunk for Inter-VLAN routing. OSPF has been configured on the router, as the routing protocol for the network. Which statement about this network is true?
Direct Inter-VLAN communication does not require OSPF.
Running both IPv4 and IPv6 on a router simultaneously is known as what?
What best describes the operation of distance vector routing protocols?
They send their routing tables to directly connected neighbors.
What is the first 24 bits in a MAC address called?
A default Frame Relay WAN is classified as what type of physical network?
What is one reason that WPA encryption is preferred over WEP?
The values of WPA keys can change dynamically while the system is used.
At which OSI layer is a logical path created between two host systems?
A company implements video conferencing over IP on their Ethernet LAN. The users notice that the network slows down, and the video either stutters or fails completely. What is the most likely reason for this?
quality of service (QoS)
What is the principal reason to use a private IP address on an internal network?
Conserve public IP addresses so that we do not run out of them.
Cisco Catalyst switches CAT1 and CAT2 have a connection between them using ports FA0/13. An 802. 1Q trunk is configured between the two switches. On CAT1, VLAN 10 is chosen as native, but on CAT2 the native VLAN is not specified. What will happen in this scenario?
A native VLAN mismatch error message will appear.
There are no boot system commands in a router configuration in NVRAM. What is the fallback sequence that the router will use to find an IOS during reload?
Flash, TFTP server, ROM
Which Cisco Catalyst feature automatically disables the port in an operational PortFast upon receipt of a BPDU?
In which integration method is an IPv6 packet encapsulated within an IPv4 protocol?
Your ISP has given you the address 18.104.22.168/29 to assign to your router’s interface. They have also given you the default gateway address of 22.214.171.124. After you have configured the address, the router is unable to ping any remote devices. What is preventing the router from pinging remote devices?
the default gateway is the broadcast address for this subnet.
Which wireless standard works only in the 2.4 GHz range and provides speeds up to 54 Mb/s?
Which command will show the MAC addresses of stations connected to switch ports?
Which command is used to debug a ping command?
debug ip icmp
Which industry-wide specification was developed to decrease the time that is needed to move to the forwarding state by switch ports that are operating in a redundantly switched topology?
For which type of connection should a straight-through cable be used?
switch to router
For the network 192.0.2.0/23, which option is a valid IP address that can be assigned to a host?
Which IPv6 routing protocol uses multicast group FF02::9 to send updates?
Which commands is necessary to permit SSH and Telnet access to a Catalyst?
transport input all
What is known as "one-to-nearest" addressing in IPv6?
Which IP address can be assigned to an Internet interface?
Which device might be installed at a branch office to enable and manage an IPsec site-to-site VPN?
Cisco Adaptive Security Appliance
A host is attempting to send data to another host on a different network. What is the first action that the sending host will take?
Send the data frames to the default gateway.
How is an EUI-64 format interface ID created from a 48-bit MAC address?
by inserting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
In an Ethernet network, under what two scenarios can devices transmit? (Choose two.)
when they detect no other devices are sending
when the medium is idle
What are some of the advantages of using a router to segment the network? (Choose two.)
Filtering can occur based on Layer 3 information.
Broadcasts are not forwarded across the router.
What is one benefit of PVST+?
PVST+ allows the root switch location to be optimized per vlan.
Which of these represents an IPv6 link-local address?
When configuring a serial interface on a router, what is the default encapsulation?
Switch ports operating in which two roles will forward traffic according to the IEEE 802.1w standard? (Choose two.)
What is valid reason for a switch to deny port access to new devices when port security is enabled?
The denied MAC address are statically configured on the port.
What is the default routing update period for RIPv2?
What are two characteristics of RIPv2? (Choose two.)
variable-length subnet masks
manual route summarization
What are two characteristics of Telnet? (Choose two.)
It sends data in clear text format.
It requires that the destination device be configured to support Telnet connections.
Which router command will verify that the router has a path to a destination network?
Router# show ip route
Which two statements describe characteristics of IPv6 unicast addressing? (Choose two.)
Global addresses start with 2000::/3.
There is only one loopback address and it is ::1.
What is the principle reason to use a private IP address on an internal network?
Conserve public IP addresses so that we do not run out of them.
Which component of VPN technology ensures that data can be read only by its intended recipient?
How does using the service password encryption command on a router provide additional security?
by encrypting passwords in the plain text configuration file
Which statement about IPv6 is true?
Broadcasts have been eliminated and replaced with multicasts.
What algorithm technology must be used for ensuring data integrity when dataflow goes over VPN tunnel? (Choose two)
A Cisco router is booting and has just completed the POST process. It is now ready to find and load an IOS image. What function does the router perform next?
It checks the configuration register
At which layer of the OSI model is RSTP used to prevent loops?
Assuming the default switch configuration, which approach should you use to configure the extended vlan range (1006 through 4094) on a Cisco Catalyst 3750 series switch?
Configure the switch to be in VTP transparent mode.
Which two commands can be used to verify a trunk link configuration status on a given Cisco switch? (Choose two)
show interface trunk
show interface switchport
Which two statements about static NAT translation are true?
They allow connections to be initiated from the outside.
They are always present in the NAT table.