CCNA - Assesment test Flashcards
What is the sys-id-ext field in a BPDU used for?
a) It is a 4-bit field inserted into an Ethernet frame to define trunking information between switches
b) it is a 12-bit field inserted into an Ethernet frame to define VLANs in an STP instance
c) it is a 4-bit field inserted into an non-Ethernet frame to define EtherChannel options
d) it is a 12-bit field inserted into an Ethernet frame to define STP root bridges
B
to allow for the PVST+ to operate, there’s a field inserted into the BPDU to accommodate the extended system ID so that PVST+ can have a root bridge configured on a per-STP instance. The extended system ID (VLAN ID) is a 12-bit field, and we can even see what this field is carrying via show spanning-tree command output. see chapter 9 for more information
You have four RSTP PVST+ links between switches and want to aggregate the bandwidth. What solution will you use?
a) EtherChannel
b) PortFast
c) BPDU Channel
d) VLANs
e) EtherBundle
A
Cisco’s EtherChannel can bundle up to eight ports between switches to provide resiliency and more bandwidth between switches. See chapter 9 for more information
You reload a router with a configuration register setting of 0x2101. What will the router do when it reloads?
a) the router enters setup mode
b) the router enters ROM monitor mode
c) the router boots the mini-IOS in ROM
d) the router expands the first IOS in flash memory into RAM
C
2100 boots the router into ROM monitor mode, 2101 loads the mini-IOS from ROM, and 2102 is the default and loads the IOS from flash. See chapter 12 for more information
Which of the following commands provides the product ID and serial number of a router?
a) show license
b) show license feature
c) show version
d) show license udi
D
the show license udi command displays the unique device identifier (UDI) of the router, which comprises the product ID (PID) and serial number of the router. See chapter 12 for more information
Which command allows you to view the technology options and licenses that are supported on your router along with several status variables?
a) show license
b) show license feature
c) show license udi
d) show version
B
the show license feature command allows you to view the technology package licenses and feature licenses that are supported on your router along with several status variables related to software activation and licensing, both licensed and unlicensed features. See chapter 12 for more information
You need to look at past network data in DNA Center. How long can you look back into the DNA snapshot?
a) 1 day
b) 3 days
c) 5 days
d) 1 week
e) 1 month
D
DNA Center stores the network snapshot for one week
You want to send a console message to you syslog server, but you only want to send status messages of 3 and lower. Which of the following commands will you use?
a) logging trap emergencies
b) logging trap errors
c) logging trap debugging
d) logging trap notifications
e) logging trap critical
f) logging trap warnings
g) logging trap alerts
B
there are eight different raps levels. If you choose, for example level 3, level 0 through level 3 messages will be displayed. See chapter 13 for more information
What configuration parameters must be configured the same between switches for LACP to form a channel? (Choose three).
a) Virtual MAC address
b) Port speeds
c) Duplex
d) PortFast enabled
e) Allowed VLAN information
B, C, E
all the ports on both sides of every link must be configured exactly the same between switches or it will not work. Spped, duplex, and allowed VLANs must match. See chapter 15 for more information
You are using the Code Preview features. Which of the following is this used for? (Choose three.)
a) enroll in beta updates for DNA Center
b) view what a code will do when ran against DNA Center
c) Generates a sample code snippet to a call the Restful API resource in the scripting language to your choose
d) viewing the source code for a DNA Center
C
the code preview feature in can generate a simple code snippet for several programming languages so you can quickly add it into your script. See chapter 21 for more information
You need to connect to a remote IPv6 server in your virtual server farm. You can connect to the IPv4 servers, but not the critical IPv6 server you desperately need. Based on the following output, what could your problem be?
C:>ipconfig
Connection-specific DNS Suffix . : localdomain
IPv6 Address …………………………..: 2001:db8:3c4d:4:ac3b:2ef:1823:8938
Temporary IPv6 Address ………..: 2001:db8:3c4d:3:2f33:44dd:211:1c3d
Link-local IPv6 Address……………: fe80::ac3b:2ef:1823:8938%11
IPv4 Address ………………………….: 10.1.1.10
Subnet Mask ………………………….: 255.255.255.0
Default Gateway ……………………: 10.1.1.1
a) the global address in the wrong subnet
b) the IPv6 default gateway has not been configured or received from the router
c) the link-local address has not been resolved so the host cannot communicate to the router
d) there are two IPv6 global addresses configured. One must be removed from the configuration
B
There is no IPv6 default gateway listed in the output, which will be the link-local address of the router interface, sent to the host as a router advertisement. Until this host receives the router address, the host will communicate with IPv6 only on the local subnet. See chapter 17 for more information
What command is used to view the IPv6-to-MAC-address resolution table on a Cisco router?
a) show ip arp
b) show ipv6 arp
c) show ip neighbors
d) show ipv6 neighbors
e) show arp
D
the command show ipv6 neighbors provides the ARP cache on a router. See chapter 17 for more information
An IPv6 ARP entry is listed as with a status of REACH. What can you conclude about the IPv6-to-MAC-address mapping?
a) the interface has communicated with the neighbor address and the mapping is current
b) the interface has not communicated within the neighbor reachable time frame
c) the ARP entry has timed out
d) IPv6 can reach the neighbor address but the addresses has not yet been resolved
A
if the state is STALE when the interface has not communicated within the neighbor reachable time frame, the next time the neighbor communicates, the state will be REACH. See chapter 17 for more information
Which configuration management solutions require agents? (Choose two).
a) Puppet
b) Ansible
c) Chef
d) Cisco IOS
A, C
Puppet and Chef require you to install an agent on the node before the configuration server can manage it. See chapter 23 for more information
_________ is a Ruby-based configuration management tool that uses custom manifest files to configure devices.
a) Ansible
b) Puppet
c) Chef
d) Manifold
B
Puppet is a Ruby-based configuration tool that uses custom manifest files to configure devices. See chapter 23 for more information
________ is a Ruby-based configuration tool that uses cookbooks to apply configuration.
a) Ansible
b) Puppet
c) Chef
d) Manifold
C
Chef is a Ruby-based configuration tool that uses cookbooks to apply configuration. See chapter 23 for more information
You have two OSPF directly configured routers that are not forming an adjacency. What should you check? (Choose two).
a) Process ID
b) Hello and dead timers
c) Link cost
d) Area
e) IP address/subnet mask
B, D, E
in order for two OSPF routers to create an adjacency, the Hello and dead timers must match, and they must both be configured into the same area, as well as being in the same subnet. See chapter 6 for more information
When do two adjacent routers enter the 2WAY state?
a) after both routers have received Hello information
b) after they have exchanged topology databases
c) when they connect only to a DR or BDR
d) when they need to exchange RID information
A
The process starts by sending out Hello packets. Every listening router will then add the originating router to the neighbor database. The responding routers will replay with all of their Hello information so that the originating router can add them to its own neighbor table. At this point, we will have reached the 2WAY state – only certain routers will advance beyond to this. See chapter 6 for more information
You want to use the Command Runner. What is this used for?
a) pushing OSPF configuration
b) pushing show commands and viewing the results
c) pushing ACL configuration
d) pushing Interface configuration
e) pushing a banner configuration
B
The Command Runner is a useful tool for pushing show commands to devices and viewing the results. See chapter 22 for more information
What type of switching is done in a network fabric?
a) layer 2
b) layer 3
c) layer 4
d) layer 7
B
A fabric entirely consists of layer 3 only. See chapter 22 for more information
Which statement about GRE is not true?
a) GRE is stateless and has no flow control
b) GRE has security
c) GRE has additional overhead for tunneled packets, at least 24 bytes
d) GRE uses a protocol-type field in the GRE header so any layer 3 protocol can be used through the tunnel
B
Generic Routing Encapsulation (GRE) has no built-in security mechanisms. See chapter 15 for more information
Which QoS mechanism will drop traffic if a session uses more than the allotted bandwidth?
a) congestion management
b) shaping
c) policing
d) marking
C
When traffic exceeds the allocated rate, the policer can take one of two actions. It can either drop traffic or re-mark it to another class of service. The new class usually has a higher drop probability. See chapter 16 for more information
IPv6 unicast routing is running on the Corp. router. Which of the following addresses would show up with the show ipv6 int brief command?
Corp#sh int f0/0
FastEthernet0/0 is up, line protocol is up
Hard is AmdFE, address is 000d.bd3b.0d80 (bia 000d.bd3b.0d80)
[output cut]
a) FF02::3c3d:0d:bdff:fe3b:0d80
b) FF80::3c3d:2d:bdff:fe3b:0d80
c) FF80::3c3d:0d:bdff:fe3b:0d80
d) FF80::3c3d:2d:ffbd:3bfe:0d80
B
This can be a hard question if you don’t remember to invert the 7th bit of the first octet in the MAC address! Always look for the 7th bit when studying for the CiscoR/S, and when using eui-64 invert it. The eui-64 auto-configuration then inserts an FF:FE in the middle of the 48-bit MAC address to create a unique IPv6 address. See chapter 17 for more information
A host sends a type of NDP message providing the MAC address that was requested. Which type of NDP was sent?
a) NA
b) RS
c) RA
d) NS
A
The NDP neighbor advertisement (NA) contains the MAC address. A neighbor solicitation (NS) was initially sent asking for the MAC address. See chapter 17 for more information
Each field in an IPv6 address is how many bits long?
a) 4
b) 16
c) 32
d) 128
B
Each field in an IPv6 address is 16-bits long. An IPv6 address is a total of 128 bits. See chapter 17 for more information
To enable OSPFv3, which of the following would you use?
a) Router(config-if)#ipv6 ospf 10 area 0.0.0.0
b) Router(config-if)#ipv6 router rip 1
c) Router(config)#ipv6 router eigrp 10
d) Router(config-rtr)#no shutdown
e) Router(config-if)#ospf ipv6 10 area 0
A
To enable OSPFv3, you enable the protocol at the interface level, as with RIPng. The command string is area-id. It’s important to understand that area 0 and area 0.0.0.0 both describe area 0. See chapter 17 for more information
