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ag-CCNA COPY PLUS > Book Notes Review 1 > Flashcards

Book Notes Review 1 Flashcards

1
Q

Command that will prompt icmp requests on the screen?

A

debug ip icmp

response
ICMP packet debugging is on.

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2
Q

How do you designate an inside and an outside nat interface?

A 
# interface g0/1
#ip nat outside
#interface g0/0
#ip nat inside
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3
Q

Give an example of a static nat configuration using 192.168.1.10 as the inside local and 200.124.22.3 as the inside global.

A

ip nat inside source static 192.168.1.10 200.124.22.3

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4
Q

Command to verify nat translations.

A

show ip nat translations

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5
Q

Explain dynamic nat.

A

internal devices assigned with private ip addresses share from a pool of public ip addresses to reach the internet. Access lists are used to identify the range of ip addresses that you want to be able to translate.

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6
Q

Explain/dynamic nat configuration.

A

Assign ip nat inside/outside to interfaces

#access-list 1 permit 192.168.1.0 0.0.0.255
*identify range of traffic you want to translate*
#ip nat pool NWKING 200.124.22.1 200.124.22.2 netmask 255.255.255.252
*public addys in pool used for translations and name the pool*
#ip nat inside source list 1 pool NWKING
*source ip addy is identified by using a list list 1 then translate it to a dynamic pool "NWKING"
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7
Q

Command to clear nat translations.

A

R1# clear ip nat translations

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8
Q

How would you display nat statistics?

A

sh ip nat statistics

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9
Q

Explain nat overlaod/pat configuration.

A

ip nat pool NWKING 200.124.22.1 200.124.22.1 netmask 255.255.255.252

Assign ip nat inside/outside to interfaces

#access-list 1 permit 192.168.1.0 0.0.0.255
*identify range of traffic you want to translate*

public addys in pool used for translations and name the pool only one ip addy is listed in the pool

*source ip addy is identified by using a list list 1 then translate it to a dynamic pool “NWKING” then overlaod is added to enable pat.

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10
Q

What command would you use to set up PAT directly on an interface?

A

ip nat inside source list 1 interface g0/0 overload.

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11
Q

Give the configuration for setting up ssh and telnet.

A 
#conf t
(config)#line vty 0 4
(config-line)#login local
(config-line)#transport input telnet ssh
(config-line)#username r2-atiba password cs
(config)#ip domain-name example.com
(config)#crypto key generate rsa
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12
Q

How to configure PAT on an interface using access list 1 and inside global int s0/0/0?

A 
#access-list 1 permit 192.168.1.0 0.0.0.255
#ip nat inside source list 1 interface s0/0/0 overload
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13
Q

LACP & PAgP modes

A

LACP - Active - Passive

PAgP - Auto - Desirable

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14
Q

Command to show all etherchannels on a switch along with negotiated protocols?

A

show etherchannel

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15
Q

IEEE standard for STP - RSTP - MST

A

STP - Spanning Tree Protocol - 802.1d
RSTP - Rapid Spanning Tree Protocol - 802.1w
MST - Multiple Spanning Tree Protocol - 802.1s

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16
Q

What does spanning tree use to check for switching loops?

A

Bridge Frames
BPDU - Bridge Protocol Data Units

STP-enabled devices exchange BPDUs to establish a spanning tree. BPDUs contain sufficient information for the devices to complete spanning tree calculation

17
Q

T/F

STP runs as a distributed process on each switch and creates a topology database.

A

True

18
Q

What is a draw back of 802.1D?

A

802.1D Spanning Tree Protocol (STP) has a drawback of slow convergence.

19
Q

Cisco Catalyst switches support three types of STPs, which are?

A

Cisco Catalyst switches support three types of STPs, which are PVST+, rapid-PVST+ and MST.

20
Q

What is IEEE standard is PVST+ based on and what Cisco proprietary extensions does it include?

A

PVST+ is based on IEEE 802.1D standard and includes Cisco proprietary extensions such as BackboneFast, UplinkFast, and PortFast.

21
Q

Rapid-PVST+ is based on what IEEE standard?

A

Rapid-PVST+ is based on IEEE 802.1w standard and has a faster convergence than 802.1D.

22
Q

802.1w includes which Cisco proprietary enhancements.

A

RSTP (IEEE 802.1w) natively includes most of the Cisco proprietary enhancements to the 802.1D Spanning Tree, such as BackboneFast and UplinkFast.

23
Q

All Cisco switches default to which cisco proprietary stp standard.

A

All cisco switches default to RPVST+ 802.1w.

24
Q

STP root bridge is elected by what criteria?

A

The lowest MAC addy & Priority.

25
Q

How many bytes are in a switches bridge ID and what do they represent?

A

Switch Bridge ID is 8 bytes long.
2 bytes bridge priority.
6 byte MAC addy

26
Q

Default bridge priority is?

A

32,768

27
Q

What is 802.1D - STP convergence time.

A

50 seconds.

28
Q

What command turns on spanning tree portfast?

A

(config-if)#spanning-tree portfast

If you enter it in global config it turns on portfast on all access ports.

29
Q

What is BPDU guard and what does it do?

A

BPDU - BPDU Guard feature is used to protect the Layer 2 Spanning Tree Protocol (STP) Topology from BPDU related attacks. BPDU Guard feature must be enabled on a port that should never receive a BPDU from its connected device.

End devices are not supposed to generate BPDUs, because in a normal network environment, BPDU messages are exchanged by network switches.

At the reception of BPDU’s GPDU guard disables the port that has porfast configured.

Transitions port into err-disable state.

30
Q

Command to enable or disable BPDU guard on an interface?

A

int gi0/0

(config-if)#spanning-tree bpduguard enable
(config-if)#spanning-tree bpduguard disable

31
Q

Commands to config ports to re-enable themselves?

A

(config) #errdisable recovery cause bpdu guard

(config) #errdisable recovery interval 400

32
Q

command to monitor/verify spanning tree summary when you are running Rapid Per VLAN Spanning Tree Plus (Rapid PVST+) or Multiple Spanning Tree (MST).

A

show spanning-tree summary totals

Shows mode, portfast/bpdu status and more

33
Q

Monitor portfast for an interface.

A

show spanning-tree int fa0/1

34
Q

Command to show if bpdu guard is enabled by default.

A

show spanning-tree summary

ag-CCNA COPY PLUS (34 decks)

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