Home > Basic Questions 2

Basic Questions 2

November 24th, 2018 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

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.

Reference: https://www.cisco.com/c/en/us/td/docs/routers/access/1900/software/configuration/guide/Software_Configuration/upgrade.html

The first option implies the router can be in a different subnet from the TFTP server -> D is not correct.

TFTP has no encryption process so answer B is correct.

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 (10) Comments
Comment pages
1 2 3747
  1. Rpatel
    February 2nd, 2020

    Please send me dumps as I have exam 200-125 CCNA on third week of Feb ,2020
    it would be really appreciated.

    roma .patel74 @ gmail. com

  2. Rosen
    February 2nd, 2020

    Hello please someone if you have any latest dumps for 200-125 CCNA to send it at: ge7_silly @ hotmail.com

  3. Dechen Wangdi
    February 5th, 2020

    Hi, can anyone send me the latest CCNA 200-125 dumps please to {email not allowed}

    Thank you so much!

  4. Ongdee
    February 5th, 2020

    Hi, can anyone send me the latest CCNA 200-125 dumps please to ongdeelam @ gmail.com

    Thank you so much!

  5. lama
    February 5th, 2020

    Hi, can anyone send me the latest CCNA 200-125 dumps please to ongdeelama @ gmail.com

    Thank you so much!

  6. Offstage
    February 5th, 2020

    Please i’m yet to write the ccna exam and i need help. If there is anyone who recently wrote the exam, please tell me some of the questions that came in it.

    Thanks in advance…

  7. Corsica13
    February 9th, 2020

    Stop asking for the dumps, you won’t get them you idiots!!! LOL.
    You have to pay to get the questions.

  8. nikosmakos
    February 12th, 2020

    Hello people, i have a 100% discount promo code in case of failure for CCNA R&S for SALE.

    Steps

    Registration instructions:
    This promotional offer is for customers who plan to register for the ICND2 (#200-105) or CCNA R&S (#200-125) between February 11, 2020 and February 17, 2020.
    To participate in this offer, book your ICND2 (#200-105) or CCNA R&S (#200-125) before February 17, 2020 as you would normally (no code needed).
    If you fail your first attempt, use the promo code.
    to register for the second attempt of the same exam for 100% off. Failure to do so will invalidate your participation in this promotion and you will be required to pay for any additional exam attempts.
    The promo code expires on February 23, 2020. Please note, there is a five-day wait period before you can retake any Cisco exams and both exam attempts must be scheduled and taken by February 23, 2020

    FOR THE promo code need to pm me.

  9. Mahfuj
    March 24th, 2020

    Hello please someone if you have any latest dumps for 200-125 CCNA to send it at: {email not allowed}

  10. Tsanga
    July 16th, 2020

    I just passed my CCNA now with 9xx, some questions on the exam were from this site. Thumbs up!!!!

    Also try: https://itexamanswers.net/ccna-200-301-dumps-full-questions-exam-study-guide-free.html

Comment pages
1 2 3747
Add a Comment