200-120 Cisco Exam Question Answers

QUESTION 31

Which two of these are characteristics of the 802.1Q protocol? (Choose two.)

A. It is used exclusively for tagging VLAN frames and does not address network reconvergence following switched network topology changes.
B. It modifies the 802.3 frame header, and thus requires that the FCS be recomputed.
C. It is a Layer 2 messaging protocol which maintains VLAN configurations across networks.
D. It includes an 8-bit field which specifies the priority of a frame.
E. It is a trunking protocol capable of carrying untagged frames.

Correct Answer: BE
Explanation:
802.1Q protocol, or Virtual Bridged Local Area Networks protocol, mainly stipulates the realization of the VLAN. 802.1Q is a standardized relay method that inserts 4 bytes field into the original Ethernet frame and re-calculate the FCS. 802.1Q frame relay supports two types of frame: marked and non-marked. Non- marked frame carries no VLAN identification information.

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QUESTION 30

Which command can be used from a PC to verify the connectivity between hosts that connect through a switch in the same LAN?

A.  ping address
B.  tracert address
C.  traceroute address
D.  arp address

Correct Answer: A
Explanation:
ICMP pings are used to verify connectivity between two IP hosts. Traceroute is used to verify the router hop path traffic will take but in this case since the hosts are in the same LAN there will be no router hops involved.

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QUESTION 29

What does a Layer 2 switch use to decide where to forward a received frame?

A.  source MAC address
B.  source IP address
C.  source switch port
D.  destination IP address
E.  destination port address
F.  destination MAC address

Correct Answer: F
Explanation:
When a frame is received, the switch looks at the destination hardware address and finds the interface if it is in its MAC address table. If the address is unknown, the frame is broadcast on all interfaces except the one it was received on.

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Question 28

At which layer of the OSI model is RSTP used to prevent loops?

A. physical
B. data link
C. network
D. transport

Correct Answer: B
Explanation:
RSTP and STP operate on switches and are based on the exchange of Bridge Protocol Data Units (BPDUs) between switches. One of the most important fields in BPDUs is the Bridge Priority in which the MAC address is used to elect the Root Bridge -> RSTP operates at Layer 2 Data Link layer -> .

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Question 27

What value is primarily used to determine which port becomes the root port on each nonroot switch in a spanning-tree topology?


A.  path cost
B.  lowest port MAC address
C.  VTP revision number
D.  highest port priority number
E.  port priority number and MAC address


Correct Answer: A
Explanation
The path cost to the root bridge is the most important value to determine which port will become the root port on each non-root switch. In particular, the port with lowest cost to the root bridge will become root port (on non-root switch).

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Question 26

 

CBT Nuggets Launches New Video Training for A+ (902), CCNA Certs

Global IT training provider CBT Nuggets (CBT) continues to add to their entire video library with the release of several new series of entry-level training : 220-902 CompTIA A +, CCNA Cisco Wireless, CCNA and Collaboration . CBT is known for their short training videos that are essential training in bites " nuggets of knowledge."


CompTIA A + 220-902, a popular CompTIA A series followed Anthony Sequeira + 220-901 training covers important topics updated Windows and other operating systems and technologies, troubleshooting security software and procedures operational .

According Sequeira, one of the main reasons why A + training splitting into two segments is because, " The amount of material A + is now overwhelming, especially given that it is intended for IT professionals to entry level . "

This format offers shared - full coverage for each exam that makes it easier for students to study and pass both exams. Instead of cramming all relevant information in both, students can now study for the A + 220-901 exam, pass, and tackle the A + 220-902.

One useful study feature is that both courses combined offer students almost 800 electronic flash cards. The software is intelligent — it asks a question and the student’s ability to answer it is rated as either hard, medium or easy.

To enhance learning and recall, the hard flash cards appear the next time the student logs in to their course. questions means easy and are discussed less often. CBT reported a high level of student satisfaction with the cards, saying they are " helping students pass the exam 901 at a very high rate . "

The A+ series is designed to provide comprehensive training to individuals looking to begin a career in IT. “It teaches the most common hardware and software technologies in business today, and helps students go on to support complex IT infrastructures,” said Sequeira.

Two additional new releases by CBT are Cisco CCNA Wireless and Cisco CCNA Collaboration.

CCNA Wireless covers the fundamentals of wireless local area networks (WLAN), including topics such as the integration of the access points (AP), a WLAN controller ( implanted ), the implementation of WLAN security, and more. Wireless training is in high demand due to the widespread increase in the use of the mobile device. More than ever before employees working away from their offices and connection via laptops, tablets and smartphones.

The CCNA Collaboration series provides the core skills needed to implement and support converged network endpoints and deliver completely new functionalities to the desk of every user in an organization. Collaboration technology usage and training are also growing rapidly. The greater demand for collaboration is being driven by an increase in employee productivity and overall cost savings.

CBT’s new releases continue to feature high-quality videos that target specific topic areas while maintaining that “sweet-spot” of study time duration — 10-15 minutes. They also retain the usual four popular features:

 - Accountability coaches that help students stay on track for certification by helping them see the value of what they are doing, setting achievable goals, and overcoming roadblocks.
 - Transcender Practice Exams are also available on CBT’s website. The practice exams enable a student to test and evaluate their knowledge level and abilities and help them to focus on areas in which they may need more practice.
 - Hands-on virtual labs that create real-world examples help students not just learn, but actually practice their new skills and abilities.
 - Offline training availability. Students can access courses 24 hours a day and are able to download up to 10 hours of training videos to watch any place at any time.

CBT training covers the top IT vendors, including Amazon, Cisco, CompTIA, Google, ITIL, Microsoft, Palo Alto, VMware and more. Their complete video library currently contains over 11,000 videos covering more than 200 topics, with 4-5 new courses every month 2-3 new videos per day.