How many hosts can a network server with an IP address of 154.37.185.9 support?

Show the workings please.

what subnet mask?
Do you want NAT?
For real life scenario what bandwidth size?

dot1x:

what subnet mask?
Do you want NAT?
For real life scenario what bandwidth size?

No all those. Just the options:
a.16,77,214
b.65.532
c.524.256
d.254

ferdiii:

How many hosts can a network server with an IP address of 154.37.185.9 support?

Show the workings please.

The first question to ask your self when solving this question is what class of ip address it fall in,  (154.37.185.9)

You can use the first octet to identify it, for example:

class  A = 1-126

class B = 128-191

class C = 192-223

127 is omitted cos its your loop back address use for testing,

now with these, where do you think the ip address fall in ? check the first octet of the ip address, (154.37.185.9)  once you are able to figure it out then you will get your answer with the calculations below,


To get the number of valid host on a class C  network do 2 power 8 = 256-2 = 254

To get  the number of valid host on a class B network do 2 power 16 = 65536 - 2 = 65534

To get the number of valid host on class A network do 2 power 24 = 16777216 - 2  =16777214


The options you gave is not correct!!

Is this helpful ?

@dot1x

Hi Loggix,

We spoke on phone concerning the Cisco devices. I am still expecting the mail as discussed.

Thanks.

You have mail, Sir.

@life_style
Your break out of the Classful Subnets would have been valid if Networks were still being designed pre-1993 before the implementation of RFCs 1519 and 4632 - CIDR. As you know, with CIDR in IPV4, Networks are no longer classified as Class A, B or C, rather we use VLSM to delineate the Subnets in a CIDR notation. For example, the IP address on the @OP could have any MASK in CIDR. it could be a 154.37.185.9/24 - 254 addresses, it could be 154.37.185.9/23 -510 addresses, etc. [or it could 154.37.185.9/25 - 128 addresses.
So in essence - the question if presented correctly, should specify the MASK. In my opinion, the original Test question is ambiguous and leaves too much to be assumed, which is not a good thing

I find it amusing that in this age of IPV4 and IPV6, some Test preps still include questions that have no relevance to modern Network designs - I hesitate to say it - but that is 'assuming' the original questions was asked in the context of Classful addressing.

Loggix:

@life_style
Your break out of the Classful Subnets would have been valid if Networks were still being designed pre-1993 before the implementation of RFCs 1519 and 4632 - CIDR. As you know, with CIDR in IPV4, Networks are no longer classified as Class A, B or C, rather we use VLSM to delineate the Subnets in a CIDR notation. For example, the IP address on the @OP could have any MASK in CIDR. it could be a 154.37.185.9/24 - 254 addresses, it could be 154.37.185.9/23 -510 addresses, etc. [or it could 154.37.185.9/25 - 128 addresses.
So in essence - the question if presented correctly, should specify the MASK. In my opinion, the original Test question is ambiguous and leaves too much to be assumed, which is not a good thing

I find it amusing that in this age of IPV4 and IPV6, some Test preps still include questions that have no relevance to modern Network designs - I hesitate to say it - but that is 'assuming' the original questions was asked in the context of Classful addressing.

Thanks so much.

life_style:

The first question to ask your self when solving this question is what class of ip address it fall in,  (154.37.185.9)

You can use the first octet to identify it, for example:

class  A = 1-126

class B = 128-191

class C = 192-223

127 is omitted cos its your loop back address use for testing,

now with these, where do you think the ip address fall in ? check the first octet of the ip address, (154.37.185.9)  once you are able to figure it out then you will get your answer with the calculations below,


To get the number of valid host on a class C  network do 2 power 8 = 256-2 = 254

To get  the number of valid host on a class B network do 2 power 16 = 65536 - 2 = 65534

To get the number of valid host on class A network do 2 power 24 = 16777216 - 2  =16777214


The options you gave is not correct!!

Is this helpful ?

Thanks so much!

hi all, i just got a cisco roter 1900 series. i enabled the secret on it. After i saved the configuration, the router asked me for username. All attempts have proved abortive as i only configured password not username.

PLS HELP

That is one of the peuliar things about the 1900, 2900, 3900 series Routers. If you fail to set a username and password after tbe initial use of the default ' cisco', it locks you out. I am afraid you will need to perform a password recovery on the Router to re-establish access.

How do I do that. I tried something similar but it won't cold boot after pressing break button. Could you please show me the way to that. Thanks

you may wish to google 'password recovery procedure on a cisco1900 Router' for a step by step procedure to accomplish the recovery process.

I gnashed my teeth while doing that yesterday. I spent 4hrs on that to no avail.

@Alien,
Sorry, I fell asleep as it was already 2:00am my time and I had to be up early for a Client's cutover. Okay here we go. I am not sure the Procedure you performed, but I have just completed the Pasw Recv process- just for giggles- on a C2900 ISR that I am shipping out to a Client's Site. The C2900 and C1900 are both ISRs and the process is Identical on both platforms
Here is the Procedure as culled form Cisco's Site. You must be careful not to skip a step.Let me know how it goes. If you need further assistance - mail me at <loggix AT yahoo DOT com> Good Luck

Example of Password Recovery Procedure
This section provides an example of the password recovery procedure. This example was created with a Cisco 2900 Series ISR. Even if you do not use a Cisco 2900 Series ISR, this output provides an example of what you should experience on your product.

Router>enable
Password:
Password:
Password:
% Bad secrets

Router>show version
Cisco IOS Software, C2900 Software (C2900-UNIVERSALK9-M), Version 15.0(1)M1,
RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2009 by Cisco Systems, Inc.
Compiled Wed 02-Dec-09 15:23 by prod_rel_team

ROM: System Bootstrap, Version 15.0(1r)M1, RELEASE SOFTWARE (fc1)

c2921-CCP-1-xfr uptime is 2 weeks, 22 hours, 15 minutes
System returned to ROM by reload at 06:06:52 PCTime Mon Apr 2 1900
System restarted at 06:08:03 PCTime Mon Apr 2 1900
System image file is "flash:c2900-universalk9-mz.SPA.150-1.M1.bin"
Last reload reason: Reload Command


This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
compliance with U.S. and local country laws. By using this product you
agree to comply with applicable laws and regulations. If you are unable
to comply with U.S. and local laws, return this product immediately.

A summary of U.S. laws governing Cisco cryptographic products may be found at:
http://www.cisco.com/wwl/export/crypto/tool/stqrg.html

If you require further assistance please contact us by sending email to
export@cisco.com.

Cisco CISCO2921/K9 (revision 1.0) with 475136K/49152K bytes of memory.
Processor board ID FHH1230P04Y
1 DSL controller
3 Gigabit Ethernet interfaces
9 terminal lines
1 Virtual Private Network (VPN) Module
1 Cable Modem interface
1 cisco Integrated Service Engine-2(s)
Cisco Foundation 2.2.1 in slot 1
DRAM configuration is 64 bits wide with parity enabled.
255K bytes of non-volatile configuration memory.
248472K bytes of ATA System CompactFlash 0 (Read/Write)
62720K bytes of ATA CompactFlash 1 (Read/Write)

Technology Package License Information for Module:'c2900'

----------------------------------------------------------------
Technology Technology-package Technology-package
Current Type Next reboot
-----------------------------------------------------------------
ipbase ipbasek9 Permanent ipbasek9
security securityk9 Permanent securityk9
uc uck9 Permanent uck9
data datak9 Permanent datak9

Configuration register is 0x2102


Router>



!--- The router was just powercycled, and during bootup a
!--- break sequence was sent to the router after seeing the following message
!--- program load complete, entry point: 0x80008000, size: 0x6fdb4c.


!

rommon 1 > confreg 0x2142

You must reset or power cycle for new config to take effect

rommon 2 > reset

System Bootstrap, Version 15.0(1r)M1, RELEASE SOFTWARE (fc1)
Copyright (c) 2009 by cisco Systems, Inc.
TAC:Home:SW:IOS:Specials for info
C2900 platform with 524288 Kbytes of main memory


program load complete, entry point: 0x80008000, size: 0x6fdb4c

Self decompressing the image : ###############################
##############################################################
##############################################################
##############################################################
############################### [OK]


Restricted Rights Legend

Use, duplication, or disclosure by the Government is
subject to restrictions as set forth in subparagraph
(c) of the Commercial Computer Software - Restricted
Rights clause at FAR sec. 52.227-19 and subparagraph
(c) (1) (ii) of the Rights in Technical Data and Computer
Software clause at DFARS sec. 252.227-7013.

cisco Systems, Inc.
170 West Tasman Drive
San Jose, California 95134-1706

Cisco IOS Software, C2900 Software (C2900-UNIVERSALK9-M), Version 15.0(1)M1,
RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2009 by Cisco Systems, Inc.
Compiled Wed 02-Dec-09 15:23 by prod_rel_team

Cisco CISCO2921/K9 (revision 1.0) with 475136K/49152K bytes of memory.
Processor board ID FHH1230P04Y
1 DSL controller
3 Gigabit Ethernet interfaces
9 terminal lines
1 Virtual Private Network (VPN) Module
1 Cable Modem interface
1 cisco Integrated Service Engine-2(s)
Cisco Foundation 2.2.1 in slot 1
DRAM configuration is 64 bits wide with parity enabled.
255K bytes of non-volatile configuration memory.
248472K bytes of ATA System CompactFlash 0 (Read/Write)
62720K bytes of ATA CompactFlash 1 (Read/Write)


--- System Configuration Dialog ---

Would you like to enter the initial configuration dialog? [yes/no]: n

Press RETURN to get started!

00:00:19: %LINK-3-UPDOWN: Interface BRI0/0, changed state to up
00:00:19: %LINK-3-UPDOWN: Interface Ethernet0/0, changed state to up
00:00:19: %LINK-3-UPDOWN: Interface Ethernet0/1, changed state to up
00:00:19: %LINK-3-UPDOWN: Interface Serial0/0, changed state to down
00:00:19: %LINK-3-UPDOWN: Interface Serial0/1, changed state to down
00:00:20: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0/0,
changed state to down
00:00:20: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0/0,
changed state to up
Router>
00:00:20: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0/1,
changed state to up
00:00:20: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0,
changed state to down
00:00:20: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/1,
changed state to down
00:00:50: %SYS-5-RESTART: System restarted --
Cisco IOS Software, C2900 Software (C2900-UNIVERSALK9-M), Version 15.0(1)M1,
RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2009 by Cisco Systems, Inc.
Compiled Wed 02-Dec-09 15:23 by prod_rel_team
00:00:50: %LINK-5-CHANGED: Interface BRI0/0,
changed state to administratively down
00:00:52: %LINK-5-CHANGED: Interface Ethernet0/0,
changed state to administratively down
00:00:52: %LINK-5-CHANGED: Interface Serial0/0,
changed state to administratively down
00:00:52: %LINK-5-CHANGED: Interface Ethernet0/1,
changed state to administratively down
00:00:52: %LINK-5-CHANGED: Interface Serial0/1,
changed state to administratively down
00:00:53: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0/0,
changed state to down
00:00:53: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0/1,
changed state to down
Router>
Router>enable
Router#copy startup-config running-config
Destination filename [running-config]?
1324 bytes copied in 2.35 secs (662 bytes/sec)
Router#
00:01:24: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0/0:1,
changed state to down
00:01:24: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0/0:2,
changed state to down
Router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#enable secret < password >
Router(config)#^Z
00:01:54: %SYS-5-CONFIG_I: Configured from console by console
Router#show ip interface brief

Interface IP-Address OK? Method Status Protocol
Ethernet0/0 10.200.40.37 YES TFTP administratively down down
Serial0/0 unassigned YES TFTP administratively down down
BRI0/0 193.251.121.157 YES unset administratively down down
BRI0/0:1 unassigned YES unset administratively down down
BRI0/0:2 unassigned YES unset administratively down down
Ethernet0/1 unassigned YES TFTP administratively down down
Serial0/1 unassigned YES TFTP administratively down down
Loopback0 193.251.121.157 YES TFTP up up
Router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#interface Ethernet0/0
Router(config-if)#no shutdown
Router(config-if)#
00:02:14: %LINK-3-UPDOWN: Interface Ethernet0/0, changed state to up
00:02:15: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0/0,
changed state to up
Router(config-if)#interface BRI0/0
Router(config-if)#no shutdown
Router(config-if)#
00:02:26: %LINK-3-UPDOWN: Interface BRI0/0:1, changed state to down
00:02:26: %LINK-3-UPDOWN: Interface BRI0/0:2, changed state to down
00:02:26: %LINK-3-UPDOWN: Interface BRI0/0, changed state to up
00:02:115964116991: %ISDN-6-LAYER2UP: Layer 2 for Interface BR0/0,
TEI 68 changed to up
Router(config-if)#^Z
Router#
00:02:35: %SYS-5-CONFIG_I: Configured from console by console
Router#copy running-config startup-config
Destination filename [startup-config]?
Building configuration,
[OK]
Router#show version
Cisco IOS Software, C2900 Software (C2900-UNIVERSALK9-M), Version 15.0(1)M1,
RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2009 by Cisco Systems, Inc.
Compiled Wed 02-Dec-09 15:23 by prod_rel_team

ROM: System Bootstrap, Version 15.0(1r)M1, RELEASE SOFTWARE (fc1)

c2921-CCP-1-xfr uptime is 2 weeks, 22 hours, 15 minutes
System returned to ROM by reload at 06:06:52 PCTime Mon Apr 2 1900
System restarted at 06:08:03 PCTime Mon Apr 2 1900
System image file is "flash:c2900-universalk9-mz.SPA.150-1.M1.bin"
Last reload reason: Reload Command

Cisco CISCO2921/K9 (revision 1.0) with 475136K/49152K bytes of memory.
Processor board ID FHH1230P04Y
1 DSL controller
3 Gigabit Ethernet interfaces
9 terminal lines
1 Virtual Private Network (VPN) Module
1 Cable Modem interface
1 cisco Integrated Service Engine-2(s)
Cisco Foundation 2.2.1 in slot 1
DRAM configuration is 64 bits wide with parity enabled.
255K bytes of non-volatile configuration memory.
248472K bytes of ATA System CompactFlash 0 (Read/Write)
62720K bytes of ATA CompactFlash 1 (Read/Write)

Configuration register is 0x2102

Router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#config-register 0x2102
Router(config)#^Z
00:03:20: %SYS-5-CONFIG_I: Configured from console by console

Router#show version
Cisco IOS Software, C2900 Software (C2900-UNIVERSALK9-M), Version 15.0(1)M1,
RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2009 by Cisco Systems, Inc.
Compiled Wed 02-Dec-09 15:23 by prod_rel_team

ROM: System Bootstrap, Version 15.0(1r)M1, RELEASE SOFTWARE (fc1)

c2921-CCP-1-xfr uptime is 2 weeks, 22 hours, 15 minutes
System returned to ROM by reload at 06:06:52 PCTime Mon Apr 2 1900
System restarted at 06:08:03 PCTime Mon Apr 2 1900
System image file is "flash:c2900-universalk9-mz.SPA.150-1.M1.bin"
Last reload reason: Reload Command

Cisco CISCO2921/K9 (revision 1.0) with 475136K/49152K bytes of memory.
Processor board ID FHH1230P04Y
1 DSL controller
3 Gigabit Ethernet interfaces
9 terminal lines
1 Virtual Private Network (VPN) Module
1 Cable Modem interface
1 cisco Integrated Service Engine-2(s)
Cisco Foundation 2.2.1 in slot 1
DRAM configuration is 64 bits wide with parity enabled.
255K bytes of non-volatile configuration memory.
248472K bytes of ATA System CompactFlash 0 (Read/Write)
62720K bytes of ATA CompactFlash 1 (Read/Write)

Configuration register is 0x2142 (will be 0x2102 at next reload)

Router#

alienvirus:

I gnashed my teeth while doing that yesterday. I spent 4hrs on that to no avail.

@Alien, I posted a step by step procedure, but got banned by the Spambot erronously. I used the procedure on a C2900 ISR, which shares a similar Platform as the C1900. I think the issue is that your desktop is not sending the proper 'key break sequence' recognised by the Router. If your Router has a flash card, power down the Router, remove the flash card, Power up the Router and this will force it into Rommon Mode. You may then proceed with the Process below:

Step-by-Step Procedure
Perform these steps in order to recover your password:

1.Either switch off or shut down the router.

2.Remove the compact flash that is on the rear of the router. This image shows the rear of the 2951 router:

3.Switch on the router.

4.Once the router is on Rommon mode, reinsert the compact flash.

5.Type confreg 0x2142 at the rommon 1> prompt in order to boot from Flash.

This step bypasses the startup configuration where the passwords are stored.

6.Type reset at the rommon 2> prompt.

The router reboots, but ignores the saved configuration.

7.Type no after each setup question, or press Ctrl-C in order to skip the initial setup procedure.

8.Type enable at the Router> prompt.

You are in enable mode and should see the Router# prompt.

9.Type configure memory or copy startup-config running-config in order to copy the nonvolatile RAM (NVRAM) into memory.

Warning: Do not enter copy running-config startup-config

10.Issue the show running-config command.

The show running-config command shows the configuration of the router. In this configuration, the shutdown command appears under all interfaces, which indicates all interfaces are currently shut down. In addition, the passwords (enable password, enable secret, vty, and console passwords) are in either an encrypted or unencrypted format. You can reuse unencrypted passwords. You must change encrypted passwords to a new password.

11.Type configure terminal.

The hostname(config)# prompt appears.

12.Type enable secret <password> in order to change the enable secret password. For example:

hostname(config)#enable secret cisco

13.Issue the no shutdown command on every interface that you use.

If you issue a show ip interface brief command, every interface that you want to use should display up up.

14.Type config-register <configuration_register_setting> . Where <configuration_register_setting> is either the value you recorded in step 2 or 0x2102 . For example:

hostname(config)#config-register 0x2102

15.Press Ctrl-z or end in order to leave the configuration mode.

The hostname# prompt appears.

16.Type write memory or copy running-config startup-config in order to commit the changes.

End

alienvirus:

How do I do that. I tried something similar but it won't cold boot after pressing break button. Could you please show me the way to that. Thanks

@Alien, I posted a step by step procedure, but it was deleted and I got banned by the Spambot erronously. I used the procedure on a C2900 ISR, which shares a similar Platform as the C1900. I think the issue is that your desktop is not sending the proper 'key break sequence' recognised by the Router. If your Router has a flash card, power down the Router, remove the flash card, Power up the Router and this will force it into Rommon Mode. Pls. click on my username and view previous posts to see the steps. At least that's where I found them. Good luck

Wow! This place is alive. It's nice to see that 3 years on, this thread is beginning to see life.
Thanks Loggix and Life-Style for being of use to those who seek help.

nateevs:

Wow! This place is alive. It's nice to see that 3 years on, this thread is beginning to see life.
Thanks Loggix and Life-Style for being of use to those who seek help.

No problem Bro, I hope you are fully back ?  we missed you.   

Yes I am back. I am working on creative ideas to get this thread going again.

Hi guyz, Am a CCNP wanna be. Just passed my switching Exam months ago, Hope dis thread will help, And my pain is, i neva have a serious Networking real life Work experience!, Lets role, am here to stay, Well done to U guyz!

Harzan:

Hi guyz, Am a CCNP wanna be. Just passed my switching Exam months ago, Hope dis thread will help, And my pain is, i neva have a serious Networking real life Work experience!, Lets role, am here to stay, Well done to U guyz!

Welcome bro!

Men you guys are the bomb. I totally love the setting. I wish say i dey Naija,i for come learn for una side. Its expensive learning all that here in UK and all the train signal and cbtnugget are not really helping in Cisco for me. Trying to buy my own gadget too and set mine up like yours to learn. Thumbs up guys, you rock

Remember dump can only help you to pass and earn youy cisco certificate but cisco router is always outthere waiting for configuration. after passing cisco certification, can you configure live cisco router? if your answer is honestly NO, then call this number for your free live configuration with ClemG on 08037224600

GUYS, NEED TO WORK IN A REAL LIFE SIMULATED ENVIRONMENT. GET GNS3, INSTALL ON A VMVARE SYSTEM, INSTALL ALL VERSIONS OF CISCO IOS U CAN GET YOUR HANDS ON. FEATURES INCLUDE ALL CISCO SWITCHES, FIREWALL DEVICES, ROUTES, ACCESS POINTS. THE ENVIRONMENT IS MOST SUITABLE WHEN YOU RUN ON A NEW COMPUTER. I USED THIS SOME YERAS AGO, UNTIL I MOVED ON TO OTHER NETWORK DEVICES. DONT GET ME WRONG, CISCO STILL STANDS OUT IN THE NETWORK DEVICE MARKET, BUT THERE ARE CHEAPER OPTIONS 4 NOW. GNS3 IS WIDELY USED BY CCNP,CCIE CANDIDATES ESPECIALLY FROM INDIA, PAKISTAN AND THE U.S. HAVE A NICE TIME USING IT. NEED HELP, CALL 07025807948,PRECIOUS

Hi Guys

Does anyone know where i can get a .pdf copy of Sybex CCNA Study Guide 7th Edition?

I can send you a copy to your mail.

@Djcn

Thanks my mail Address is akherehiz@yahoo.com

Those who have made payments using Cisco site should pls help. Which Nigerian bank's VISA card is best to use in paying for CCNA certificate with Cisco Networking Academy U.S.A website. Thanks

i currently hold my CCNP which i got last year august. Working serious to get a cCIP, THEN CCIE WRITTEN. I got all cisco ios for almost all platform wit versions, ASA PIX ETC. Junos on qemu, cisco iou version three, work alot with gns3, vmware etc, i got cnnp vids from jeremy, official cisco press vids, ine ccip complete kit, mpls,bgp,qos(also got cbt qos).stuff on vyatta, brocade,juniper and have tested mikrotik on vmware. Just started my own blog. Looking for a study partner 4 ccig i.e bgp+mpls.and wuld love to share ma stuff.