CCNA 1.0 - Network Fundamentals Flashcards
What are FLPs?
Fast Link Pulses - signals that indicate what speed/duplex an interface is capable of, used in autonegotiation
If one side of a link uses autonegotiation and the other does not, what speed will be used on the link?
The non-autonegotiating side’s speed.
If one side of a link uses autonegotiation and the other does not, what duplex setting will be used if the speed is 10 or 100?
half duplex
If one side of a link uses autonegotiation and the other does not, what duplex setting will be used if the speed is 1000 or faster?
full duplex
What do hubs do with FLPs?
Nothing. FLPs are not forwarded or generated by hubs.
How do the commands “speed auto” and “duplex auto” appear in the show run command?
They don’t - those are defaults, which by default aren’t shown.
What command disables MDIX?
no mdix auto
True or false: auto MDIX needs to be enabled on both ends of a link in order for it to work correctly.
False - either end can detect the problem and enable MDIX
What command resets an interface to default settings?
default interface (int-id)
If line/protocol status is admin down and down, interface status will be…
disabled
If line/protocol status is down and down, interface status will be…
notconnect
If line/protocol status is up and down, interface status will be…
notconnect
If line/protocol status is down and down(err-disabled), interface status will be…
err-disabled
If line/protocol status is up and up, interface status will be…
connected
True or false: links that are showing up/up can still have duplex mismatch issues.
True
Late collisions can be indicative of…
duplex mismatch
If CRC errors grow but collisions do not, the issue could be…
interference on the cable
Watts supplied by:
PoE
PoE+
UPoE
UPoE+
15
30
60
90
PoE/+ uses ___ pairs of wires, while UPoE/+ uses ____.
2, 4
What are the topological differences between:
1) E-Line
2) E-LAN
3) E-Tree
1) point-to-point
2) Full mesh
3) hub-and-spoke, partial mesh, point-to-multipoint
What is a wireless “station”?
an end-user device
What exactly is an SSID?
A text string in a beacon frame
What are two ways a station can find a BSS?
passive scanning (passive) or a probe request (active)
What does a station send to join a BSS?
An association request
What does a BSS have a wired connection to?
A distribution system
What is an extended service set?
Multiple APs offering the same SSID over different BSSIDs
When a stations roams from one AP to another in an ESS, what does it send to the new AP?
a reassociation request
On an AireOS wireless controller, what type of interface maps a WLAN to a VLAN?
a dynamic interface
When a WLAN is created, what two things are bound together in the controller?
a VLAN and an SSID
How many WLANs can be configured on a Cisco controller?
512
The term “Cisco AP” refers to what type of AP, as opposed to what other type of AP? What types of uplinks do they need to the DS?
Lightweight, autonomous
Access, trunk
Which (software) interface on a WLC is used to establish CAPWAP tunnels?
the management interface
Which (software) interface on a WLC is used to relay DHCP requests, perform client authentication, etc.?
the virtual interface
If the physical port is used, which WLC (software) interface is used for out-of-band management?
the service interface
True or false: WLCs can support either PAgP or LACP.
False - neither. WLCs only support static LAG.
What DHCP option tells APs about their WLC?
Option 43. This is not necessary if the WLC is in the same subnet as the AP, as the AP will send a CAPWAP discovery message to which the WLC will reply.
What are the three main 802.11 message types?
Management, Control, and Data
10gig ethernet can reach __ meters over ___ cable; and ___ meters over ____ cable.
55, Cat 6; 100, Cat 6A
