CCNA questions Part 9

Some more random Cisco oriented Networking questions to stimulate the mind - if you're interested in this kind of thing. :-)


1. A CIDR (Classless Inter-Domain Routing) value of /30 equates to what subnet mask?

A.) 255.255.255.253
B.) 255.255.255.128
C.) 255.255.255.248
D.) 255.255.255.252

2. Your network features a combination of Cisco, 3COM and Netgear switches. You have been tasked to set up VLANS on your switched network. What trunking method should you use?

A.) Inter-Switch Link (ISL)
B.) IEEE 802.1Q
C.) You can't create VLANs by combining switches from different vendors

3. What type of NAT allows you to map multiple unregistered IP addresses to a single registered IP address?

A.) Static NAT
B.) Dynamic NAT
C.) Overloading (Port Address Translation)

4. When STP is converging no data can move through the switched network.

A.) True
B.) False

5. What is the encapsulation type of Transport Layer?

A.) Segments
B.) Packets
C.) Frames
D.) Bits



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1. Correct Answer D

255.255.255.252 = /30

Classless Inter-Domain Routing is based on variable-length subnet masking (VLSM), which allows a network to be divided into variously sized subnets, providing the opportunity to size a network more appropriately for local needs

2. Correct Answer B

IEEE 802.1Q is the VLAN standard on all network devices, ISL is a cisco proprietary protocol.

3. Correct Answer C

Port Address Translation (PAT), or Overloading,  is an extension to network address translation (NAT) that permits multiple devices on a local area network (LAN) to be mapped to a single public IP address. The goal of PAT is to conserve IP addresses.

4. Correct Answer A

All ports are in placed in a blocking state while STP converges.

5. Correct Answer A

Segments = Transport Layer
Packets = Network layer
Frames = Datalink Layer
Bits = Physical Layer

"If a man will not work, he shall not eat." - 

2 Thessalonians 3:10

CCNA Questions Part 8

Another set of Random Networking Questions for your learning pleasure.


1. What OSI layer does the following refer to?

"Establishes availability of intended communication partners, establishes agreement on procedures regarding error recovery and data integrity and synchronizes networked applications"

A.) Transport layer
B.) Session layer
C.) Datalink layer
D.) Application layer
E.) Presentation layer

2. In Cisco the running-config is found in the ...

A.) NVRAM
B.) DRAM
C.) FLASH
D.) ROM

3. Where would you place standard access lists?

A) As close to the destination as possible
B) As close to the source as possible

4. How would you copy the IOS to a TFTP server?

A.) Router(config)#copy ram tftp
B.) Router(config)#copy tftp flash
C.) Router#copy flash tftp
D.) Router#copy tftp flash
E.) None of the above

5. What happens if a packet does not match any of an Access Lists (ACL) statements?
 
A.) Nothing
B.) It is rejected
C.) It is allowed

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1. Correct Answer D

In TCP/IP, the application layer contains all protocols and methods that fall into the realm of process-to-process communications across an Internet Protocol (IP) network. Application layer methods use the underlying transport layer protocols to establish host-to-host connections.

2. Correct Answer A

NVRAM

3. Correct Answer: A

Standard access lists only filter based on source address so they have to be placed as close to the destination as possible.

4. Correct Answer C

Router#copy flash tftp - Cisco IOS is stored in Flash memory on their devices.

5. Correct Answer B

It is rejected because all ACL's by default have an explicit "Deny All" statement at the end, that drops any packet that does not match the list.  This is usually bypassed by adding the "allow any any" statement at the end of the list.

How did you go?  Add a comment if you like - have a great day!

"The larger the island of knowledge, the longer the
shoreline of wonder."
Ralph W. Sockman

CCNA Questions Part 7

Another set of Random Networking Questions to Ponder, Have Fun


1. What will be the IP address of the second subnet given the following?

172.16.0.0
255.255.224.0
(Assume ip subnet-zero is enabled)

A) 172.16.0.0
B) 172.16.8.0
C) 172.16.16.0
D) 172.16.32.0
E) 172.16.64.0

2. What Cisco IOS enhanced editing command end the configuration mode and returns to EXEC?

A.) Ctrl+Z
B.) Ctrl+W
C.) Ctrl+F
D.) Esc+F
E.) Tab

3. What Transport layer protocol are we describing?

"A reliable connection-oriented protocol with flow control"
A.) UDP
B.) TCP

4. What is the IEEE standard describing VLANs called?

A.) IEEE VLAN
B.) 802.3
C.) 802.1q
D.) 802.11b
E.) 802.3q

5. Where is the best position to place an Extended ACL?

A.) As close to the destination as possible
B.) As close to the source as possible

6. What IOS command would you issue in privileged-mode to change the running-config? (Cisco)

A.) config t
B.) config mem
C.) config net
D.) config run




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1. Correct Answer: D

172.16.32.0
Easy way to get the Block size 256-224 = 32, now count in blocks of 32
First subnet 172.16.0.0 to 172.16.31.255, Second subnet starts 172.16.32.0

2. Correct Answer A

Cisco Keyboard Shortcut Actions 

• Up Arrow Displays your previous commands.  (command history)
• TAB Key Completes a partially typed CLI commands.
• CTRL+Z Takes you back to Privileged EXEC Mode.
• CTRL+A Places the cursor at the beginning of a line.
• CTRL+E Places the cursor at the end of a line.
• CTRL+R Redisplays the current command line.
• CTRL+W Erases a word (behind the cursor).
• CTRL+U Erases an entire line.

3. Correct Answer B

Transmission Control Protocol (TCP) provides reliable, ordered delivery of a stream of octets from a program on one computer to another program on another computer.

4. Correct Answer: C

The IEEE 802.1Q standard specifies a standard method for inserting virtual LAN (VLAN) membership tags into Ethernet frames.

5. Correct Answer A

The general rule is to place standard ACLs as close to the destination as possible and to position extended ACLs as close as possible to the source of the traffic that will be denied. This is because extended ACLs can take in to account source and destination addresses as well as port numbers.

6. Correct Answer A

config t (configure terminal)

Extra one this week, Hope you had some success - have a great day.

3 Simple Mindset “Tricks” To Take Consistent Action |

3 Simple Mindset “Tricks” To Take Consistent Action |

An interesting article worth a look...

CCNA Questions Part 6

Part 6 of the Networking Questions to keep the old Grey matter ticking - enjoy.



1. If I were to give an IP address to VLAN1, then VLAN2, and VLAN3, which VLAN would be the management VLAN? (Cisco)

A.) VLAN0
B.) VLAN1
C.) VLAN2
D.) VLAN_A
E.) VLAN01

2. What layer of the OSI model is responsible for multiplexing upper-layer applications, establishing sessions and tearing down virtual circuits?

A.) Presentation
B.) Session
C.) Transport
D.) Network
E.) Data Link

3. Which of the following commands would correctly add a message of the day banner? (Cisco)

A.) Router(config)#banner #
B.) Router(config)#banner motd #
C.) Router#banner motd #
D.) Router#banner #

4. Triggered updates are used to speed the routing protocol convergence process?

A.) True
B.) False

5. What is the reserved address space for a Class B IPV4 network?

A.) 10.0.0.0 - 10.255.255.255
B.) 20.0.0.0 - 20.255.255.255
C.) 172.16.0.0 - 172.31.255.255
D.) 192.168.0.0 - 192.168.255.255
E.) 208.168.0.0 - 208.168.255.255




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1. Correct Answer: B

VLAN1 is a management VLAN and by default all ports on a switch are members of VLAN1.  Cisco recommends that you use VLAN1 for administrative purposes only, also note you can't change the name of VLAN1.

2. Correct Answer: C

In computer networking, the transport layer or layer 4 provides end-to-end communication services for applications within a layered architecture of network components and protocols. The transport layer provides services such as connection-oriented data stream support, reliability, flow control, and multiplexing.

3. Correct Answer: B
 
A Basic Example of the Command sequence is as follows:

Router>enable
Router>Password:cisco
Router#configure terminal
Router(config)#hostname London
London(config)#banner motd #welcome#
London(config)#exit
4. Correct Answer A

A triggered update is sent immediately in response to a change in the network (e.g. A link going down). The router detecting the change immediately sends an update message to its adjacent routers, which then generate their own triggered updates. This process continues until the network converges. Triggered updates occurs independently from the regular routing updates and are intended to speed the convergence process.

5. Correct Answer C

172.16.0.0 - 172.31.255.255

How did you go? Leave a comment if you disagree or have any questions - have a great day.

 "Hard work often leads to success. 

No work seldom does."
  --Harvey Mackay