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77 Cards in this Set

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Cut-Through is a form of what in relation to switching?

Frame Processing

What purpose does the SFD (Start Frame Delimiter) serve?

Show that the preamble has ended, and the destination MAC is about to begin.

What protocols can be used to access the VTY lines on a cisco device?

SSH and Telnet

What is this model called?

Switching Model

What is the name of the bit set that is used to acknowledge a communication from a host, and is the last stage of the three way handshake?

ACK

What type of cable is used to connect a switch to a host?

Straight-through

What type of cable is used to connect a switch console port to a host?

Rollover

DNS

Domain Name System

What layer does DNS allow us to resolve an address for?

Layer 3

When Host A is sending an ARP request for Host B, what will be the destination MAC?

ffff.ffff.ffff (broadcast)

The SHOW CONTROLLER SERIAL 0 command would show what useful information?

DTE/DCE cable end

We must have two addresses to transmit data, what are they?

Layer 2 and layer 3 addresses

Which protocol will be run first when attempting to deliver data to a new destination?

DNS

DNS is reliant on what in order to function?

a DNS server

ARP is reliant on what in order to function?

IP address of destination

DHCP

Dynamic Host Configuration Protocol

Four basic steps to how a host gets information through DHCP.

DORA:


Discover


Offer


Request


Acknowledge

Enable the DHCP server on a device

(config)#SERVICE DHCP

Create or edit an existing DHCP pool.

(config)#IP DHCP POOL XX

Specify the network and subnet mask (prefix) of the pool.

(dhcp-config)#NETWORK 192.168.0.0/24

Configure the amount of time the DHCP leases are valid.

(dhcp-config)#LEASE XX

Specify addresses that should be excluded, and not distributed via DHCP in any pool.

(config)#IP DHCP EXCLUDED-ADDRESS

Specify the DNS server(s) that should be advertised to clients.

(dhcp-config)#DNS-SERVER

What is the subnet mask for 192.168.0.1/19?

255.255.224.0

What is 192.168.5.150 in binary?

1100000.10101000.00000101.10010110

What is the range for class A IP addresses?

1-126

What is the range for class B IP addresses?

128-191

What is the range for class C IP addresses?

192-223

Class A default network mask.

255.0.0.0

Class A default network bits.

8

Class A default host bits.

24

Class B default network mask.

255.255.0.0

Class B default network bits.

16

Class B default host bits.

16

Class C default network mask.

255.255.255.0

Class C default network bits.

24

Class C default host bits.

8

Loopback addresses.

127.###.###.###

What is the range for class D (reserved for multicasting) IP addresses?

224-239

What is the range for class E (reserved for future use) IP addresses?

240-255

What does "Excluded address" refer to in reference to DHCP?

Addresses that have been removed from the DHCP pool.

What layer does DNS allow us to resolve an address for?

Layer 3

Where is the ARP table stored for use by client machine?

On each host in an ARP cache

Which protocol will be run first when attempting to deliver data to a new destination?

DNS

DHCP is the preferred method of getting network information to hosts in the industry.

True

In the following proxy arp environment, what MAC would Host A receive from ARP for Host B?

Routers E0 (closest on router to Host A)

What does DNS stand for?

Domain Name System

What is DHCP used for?

Dynamically assigning network info to hosts

When Host B is sending an ARP reply for Host A, what will be the destination MAC?

Host A's MAC

When is Proxy ARP required over normal ARP?

When there is a router between Host A and Host B




When each host is on a different network

Network information can be assigned manually to hosts without the use of DHCP.

True

ARP is reliant on what in order to function?

IP address of destination

Global configuration mode - effects the whole device


(config)

#CONFIGURE TERMINAL

Line configuration mode, used for the VTY lines and for the console port.


(config-line)

(config)#LINE VTY 0 4

Interface configuration mode, used for changes on a specific interface.


(config-if)

(config)#INTERFACE FAST 0/23

To connect to the console port, you must use these options with your rollover cable:

9600 Bits per second


No Parity


1 stop bit


No flow control

Put a password on the console port, need two commands on CON 0 line:

(config-line)#PASSWORD ___________


(config-line)#LOGIN

In order to use Telnet or SSH, you mus have a password configured to them (3 commands for lines 0 through 4):

(config)#LINE VTY 0 4


(config)#LOGIN


(config)#PASSWORD ___________

In order to access the ENABLE mode from a VTY line, you must have an enable password set (2 commands):

(config)#ENABLE PASSWORD ___________


(config)#ENABLE SECRET __________

In order to get SSH setup and working (5 commands)

(config)#IP DOMAIN-NAME


(config)#HOSTNAME


(config)#CRYPTO KEY GENERATE RSA


(config)#USERNAME ______ PRIVILEGE 15 PASSWORD ______

Command to show the current SSH session on the device

#SHOW SSH

3 Banners for this class

Exec Banner


Login Banner


MOTD

Exec Banner (2):

Shown to users after they authenticate into the device.


Shown via console or VTY

Login Banner (2):

Shown to users before they authenticate into the device, below the MOTD.


Only shown via VTY.

MOTD stands for:

Message of the Day

MOTD (2):

Shown to users before they authenticate into the device. (Usually the legal message is put here)


Shown via console or VTY.

Command for Exec Banner

(config)#Banner EXEC $(any symbol) ___________ $

Command for Login Banner

(config)#BANNER LOGIN *(any symbol) ______________ *

Command for MOTD

(config)#BANNER MOTD #(any symbol) ______________ #

Command for Exec Timeout for 5 minutes

(config-line)#EXEC-TIMEOUT 5 0




(check with help because this maybe in seconds not minutes)

Command for History

#SHOW HISTORY

Command for History size

(config-line)#HISTORY SIZE XX

Command to display the console logs on current line

#TERMINAL MONITOR

What will the destination IP address of a DHCP discover message be?

255.255.255.255

A DHCP offer is the second step of the DHCP process, what type of transmission is it?

Broadcast

What type of banner should be used to display to all users after they authenticate?

Exec Banner

Because the DHCP process is dependent on ______, it is _______ affected by layer 3 connections

broadcasts, severly