CCNA 3 Scaling Networks Final Study Guide
If a company wants to upgrade a Cisco 2800 router from IOS 12.4T, what IOS should be recommended for a stable router platform?
15.1M
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
Which encryption protocol is used by the WPA2 shared key authentication technique? __________
AES
A remote classroom can successfully access video-intensive streaming lectures via wired computers. However, when an 802.11n wireless access point is installed and used with 25 wireless laptops to access the same lectures, poor audio and video quality is experienced. Which wireless solution would improve the performance for the laptops?
Add another access point.
What are two requirements to be able to configure an EtherChannel between two switches? (Choose two.)
All the interfaces need to be working in the same duplex mode. All the interfaces need to work at the same speed.
A network administrator enters the spanning-tree portfast bpduguard default command. What is the result of this command being issued on a Cisco switch?
Any switch port that has been configured with PortFast will be error-disabled if it receives a BPDU.
The __________ area interconnects with all other OSPF area types.
Backbone
What two conditions have to be met in order to form a cluster that includes 5 access points? (Choose two.)
Clustering mode must be enabled on the APs. The APs have to be connected on the same network segment.
A network engineer is troubleshooting a single-area OSPFv3 implementation across routers R1, R2, and R3. During the verification of the implementation, it is noted that the routing tables on R1 and R2 do not include the entry for a remote LAN on R3. Examination of R3 shows the following: 1.that all interfaces have correct addressing 2.that the routing process has been globally configured 3.that correct router adjacencies have formed What additional action taken on R3 could solve the problem?
Enable the OSPFv3 routing process on the interface connected to the remote LAN.
A network engineer is configuring a LAN with a redundant first hop to make better use of the available network resources. Which protocol should the engineer implement?
GLBP
What is the purpose of the Cisco PAK?
It is a key for enabling an IOS feature set.
Which technology is an open protocol standard that allows switches to automatically bundle physical ports into a single logical link?
LACP
What is a wireless modulation technique used by 802.11 WLAN standards that can implement MIMO?
OFDM
When are EIGRP update packets sent?
Only when necessary
What are two features of OSPF interarea route summarization? (Choose two.)
Routes within an area are summarized by the ABR. ABRs advertise the summarized routes into the backbone.
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 engineer is troubleshooting a newly deployed wireless network that is using the latest 802.11 standards. When users access high bandwidth services such as streaming video, the wireless network performance is poor. To improve performance the network engineer decides to configure a 5 Ghz frequency band SSID and train users to use that SSID for streaming media services. Why might this solution improve the wireless network performance for that type of service?
The 5 GHz band has more channels and is less crowded than the 2.4 GHz band, which makes it more suited to streaming multimedia.
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.
A network administrator issues the command R1(config)# license boot module c1900 technology-package securityk9 on a router. What is the effect of this command?
The Evaluation Right-To-Use license for the Security technology package is activated.
What is a difference between the Cisco IOS 12 and IOS 15 versions?
The IOS version 15 license key is unique to each device, whereas the IOS version 12 license key is not device specific.
A network designer is considering whether to implement a switch block on the company network. What is the primary advantage of deploying a switch block?
The failure of a switch block will not impact all end users.
Which two statements are correct about EIGRP acknowledgment packets? (Choose two.)
The packets are sent as unicast. The packets are unreliable.
A network administrator is troubleshooting slow performance in a Layer 2 switched network. Upon examining the IP header, the administrator notices that the TTL value is not decreasing. Why is the TTL value not decreasing?
This is the normal behavior for a Layer 2 network.
EIGRP keeps feasible successor routes in the _________ table.
Topology
What method of wireless authentication is dependent on a RADIUS authentication server?
WPA2 Enterprise
A network administrator in a branch office is configuring EIGRP authentication between the branch office router and the headquarters office router. Which security credential is needed for the authentication process?
a common key configured with the key-string command inside a key chain
What are two requirements when using out-of-band configuration of a Cisco IOS network device? (Choose two.)
a direct connection to the console or AUX port a terminal emulation client
Which characteristic would most influence a network design engineer to select a multilayer switch over a Layer 2 switch?
ability to build a routing table
Which wireless network topology is being configured by a technician who is installing a keyboard, a mouse, and headphones, each of which uses Bluetooth?
ad hoc mode
Which action should be taken when planning for redundancy on a hierarchical network design?
add alternate physical paths for data to traverse the network
For troubleshooting missing EIGRP routes on a router, what three types of information can be collected using the show ip protocols command? (Choose three.)
any interfaces on the router that are configured as passive networks that are unadvertised by the EIGRP routing protocol any ACLs that are affecting the EIGRP routing process
A network engineer is implementing security on all company routers. Which two commands must be issued to force authentication via the password 1C34dE for all OSPF-enabled interfaces in the backbone area of the company network? (Choose two.)
area 0 authentication message-digest ip ospf message-digest-key 1 md5 1C34dE
What are three access layer switch features that are considered when designing a network? (Choose three.)
port density Power over Ethernet forwarding rate
In a large enterprise network, which two functions are performed by routers at the distribution layer? (Choose two.)
provide data traffic security connect remote networks
What are the two methods that are used by a wireless NIC to discover an AP? (Choose two.)
receiving a broadcast beacon frame transmitting a probe request
Which address is used by an IPv6 EIGRP router as the source for hello messages?
the interface IPv6 link-local address
Which technological factor determines the impact of a failure domain?
the role of the malfunctioning device
What are two reasons to implement passive interfaces in the EIGRP configuration of a Cisco router? (Choose two.)
to provide increased network security to avoid unnecessary update traffic
When should EIGRP automatic summarization be turned off?
when a network contains discontiguous network addresses
When will a router that is running EIGRP put a destination network in the active state?
when the connection to the successor of the destination network fails and there is no feasible successor available
When does an OSPF router become an ABR?
when the router has interfaces in different areas
