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Basic Questions 2

November 30th, 2017 Go to comments

Question 1

Explanation

MDI stands for “Medium Dependent Interface”. MDI is a type of Ethernet port found on network devices. When connecting two devices with MDI ports (two hosts, for example) an Ethernet crossover cable is required. The crossover cable switches the send and receive ports on the two connectors, allowing data to flow correctly between two MDI ports.

Question 2

Explanation

Physical addresses or MAC addresses are used to identify devices at layer 2 -> A is correct.

MAC addresses are only used to communicate on the same network. To communicate on different network we have to use Layer 3 addresses (IP addresses) -> B is not correct; E is correct.

Layer 2 frame and Layer 3 packet can be recognized via headers. Layer 3 packet also contains physical address -> C is not correct.

On Ethernet, each frame has the same priority to transmit by default -> D is not correct.

All devices need a physical address to identify itself. If not, they can not communicate -> F is not correct.

Question 3

Question 4

Explanation

Only router can break up broadcast domains but in this exhibit no router is used so there is only 1 broadcast domain.

For your information, there are 7 collision domains in this exhibit (6 collision domains between hubs & switches + 1 collision between the two switches).

Question 5

Explanation

Use an Ethernet straight-through cable to connect an medium dependent interface (MDI) to an MDI-X port. Use a cross-over cable to connect an MDI to an MDI port, or an MDI-X to an MDI-X port.

Reference: https://www.cisco.com/c/en/us/td/docs/security/asa/hw/maintenance/5505guide/ASA5505HIG/pinouts.html

Note: MDI/MDIX is a type of Ethernet port connection using twisted pair cabling.

Question 6

Explanation

According to the Cisco guide at https://www.cisco.com/c/en/us/td/docs/routers/access/1900/software/configuration/guide/Software_Configuration/upgrade.html

“Make sure that the server and the router each have an IP address in the same network or subnet.”

Question 7

Explanation

At the end of each frame there is a Frame Check Sequence (FCS) field. FCS can be analyzed to determine if errors have occurred. FCS uses cyclic redundancy check (CRC) algorithm to detect errors in the transmitted frames. Before sending data, the sending host generates a CRC based on the header and data of that frame. When this frame arrives, the receiving host uses the same algorithm to generate its own CRC and compare them. If they do not match then a CRC error will occur.

Ethernet802.3_Frame_Format_2.jpg

The “Type/Length” field is used to indicate the “Type”of the payload (Layer 3 protocol) which is indicated as a Hexadecimal value.

Note: Ethernet II uses “Type” while the old Ethernet version use “Length”

Question 8

Question 9

Explanation

Single-mode fiber allows only one mode of light to propagate. Because of this, the number of light reflections created as the light passes through the core decreases, lowering attenuation and creating the ability for the signal to travel further. This application is typically used in long distance, higher bandwidth.

Because of the high dispersion and attenuation rate with multimode fiber cable, the quality of the signal is reduced over long distances.

Reference: https://www.multicominc.com/training/technical-resources/single-mode-vs-multi-mode-fiber-optic-cable/

In fact it is difficult to say what the maximum distance of single-mode or multimode fiber but according to this link (table 1):

https://www.cisco.com/c/en/us/products/collateral/interfaces-modules/gigabit-ethernet-gbic-sfp-modules/product_data_sheet0900aecd8033f885.html

Single-mode cable is good for installations longer than 10km.

At present, there are four kinds of multi-mode fibers: OM1, OM2, OM3 and OM4. The letters “OM” stand for optical multi-mode. OM3 and OM4 fibers will support upcoming 40 and 100 Gb/s speeds.

Comments (33) Comments
  1. Vincent
    December 6th, 2017

    Could i have a dumps for newest question in this site please, because the file in september dont content these newest question (for exemple drag and drop 2 and 3 and others topics)?

  2. Stark
    December 7th, 2017

    kindly provide link related to questions for these answers

  3. mark
    December 11th, 2017

    @9tut please provide questions for these new answers-Basic question 2,stp questions 3 and others.IT is not the same as in your FAQ.

  4. issa l zabarbar
    December 17th, 2017

    what does “9tut” stand for?

  5. Fatma
    December 30th, 2017

    Where is Question 3 Explanation ???

  6. Fatma
    December 30th, 2017

    Where is Question 8 Explanation ???

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    January 7th, 2018

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  8. Meo
    January 10th, 2018

    Passed today with 933. 100% Questions from 9tut. Thanks 9tut

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    January 12th, 2018

    How can I see the full Q & A in this website?

  10. Roman
    January 12th, 2018

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    January 15th, 2018

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    January 16th, 2018

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    March 11th, 2018

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  24. Tony
    March 17th, 2018

    Question 6 – Answer D may not be correct. The full explanation from the Cisco link:
    Verify that the TFTP or RCP server has IP connectivity to the router. If you cannot successfully ping between the TFTP or RCP server and the router, do one of the following:
    – Configure a default gateway on the router.
    – Make sure that the server and the router each have an IP address in the same network or subnet

    The 1st choice to configure default gateway is to communicate beyond the LAN. In fact, you always can tftp to other networks as long as the valid routing existed. The tftp not supporting encrypted format is true, at least when tftp originally developed.

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    March 19th, 2018

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    March 19th, 2018

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    March 26th, 2018

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    March 27th, 2018

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    March 29th, 2018

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  31. Lennin
    April 6th, 2018

    In a simple way, can anybody explain to me what is APIC-EM, is it an OS, Application or software. I understand it configures the branch or enterprise network automatically. Equivalent to CISCO router does that mean if there is a Cisco router at the main office with APIC-EM it will automatically configure the other routers on the branches ?

  32. quantisol
    April 23rd, 2018

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  33. Sinix
    April 24th, 2018

    Q.6 Which statement about upgrading a Cisco IOS device with TFTP server?
    A. the operation is performed in active mode
    B. the operation is performed in unencrypted format – Correct, TFTP uses no security or encryption.
    C. the operation is performed in passive mode
    D. the Cisco IOS device must be on the same LAN as the TFTP server – Incorrect, they do not have to be in the same LAN. It can use the default gateway to get there.

    This makes more sense. Am I wrong? what do you guys think?

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