CCNA 2024 EXAM QUESTIONS

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CCNA 2024 EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -100 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: How do you show the running configuration files?

Answer:

show running-config

Question 2: What is the command to show the trunk interfaces?

Answer:

sh interfaces trunk

Question 3: What is ECN?

Answer:

Explicit congestion notification Provides End to End (between 2 endpoints) notification of network congestion WITHOUT dropping packets.Optional feature that requires both endpoints to support it.Question 4: What is the difference between a network firewall and a host-based firewall?

Answer:

Host based firewalls are software applications that filter traffic entering and exiting a host machine, like a PC Network based firewall filter traffic between networks

Question 5: What does a packet include?

Answer:

Data layer, L4 header, and a L3 Header

Question 6: Which part of the ethernet frame checks for errors?

Answer:

Frame Check Sequence, it is the ethernet trailer for a packet. Detects corrupted data by running a CRC algo over the received data

Question 7: What is the preamble and the SFD?

Answer:

Preamble allows devices to synchronize their receiver clocks. 7 Bytes Start Frame Delimiter, 1 Byte. Marks the end of the preamble, and the beginning of the rest of the frame

Question 8: What are the alternative names for tagged and untagged ports?

Answer:

Trunk ports = "tagged" port Access ports = "untagged" ports

Question 9: What does half-duplex mean?

Answer:

The device cannot send and receive data at the same time. If it is receiving a frame, it must wait before sending a frame.If there is a duplex mismatch, a collision will occur. For example, if SW1 F0/1 interface has a different duplex than SW2 F0/2, a collision will occur.Question 10: What are examples of errors that might occur on a network interface?

Answer:

Runts, Giants, CRC

Question 11: What is carrier sense multiple access with collision detection?

Answer:

Before sending frames, devices 'listen' to the collision domain until they detect that other devices are not sending.If a collision does occur, the device sends a jamming signal to inform the other devices that a collision has happened.CSMA/CD detects and avoid collisions on half-duplex interfaces

Question 12: What is the command to create a switchport for a vlan?

Answer:

First, which interface range do you want to modify? You can use the range below: interface range g1/0-3, fx/x (the x is any computers or device you want to be in that switchport) Second, you can enter the command below to manage the switchport on those ranges: switchport mode access vlan xxx Question 13: What does "Type: Dynamic" mean in a sh mac address-table?

Answer:

Dynamic = The devices created the ARP table by learning it through using the switch, we did not statically enter the MAC addresses.Question 14: If a host device would like to send a packet out to a remote destination, where must it send it?

Answer:

To send packets outside of their local networks, they must send the packets to their default gateway.

Question 15: What is the default state for a Switch interface?

Answer:

Switch interfaces do NOT have the "shutdown" command applied by default. It will be in an up/up state if connected to another device OR down/down if not connected to another device

Question 16: Which pins send/receive data for PCs?

Answer:

PCs:

Sends/transmits data on pin 1 and 2 and Receives on 3 and 6.

Question 17: When you send a ping larger than 1000 bytes, what happens?

Answer:

The Ip gets fragmented and then is Reassembled.When it is reassembled, it indicates the echo request location

Question 18: What is the definition of VID in 802.1Q?

Answer:

In a 802.1Q Tag, a VID is the VLAN ID.It identifies the VLAN the frame belongs to 12 bits in length = 4096 total vlans (2^12)

Question 19: What are the commands to configure the trunk interface?

Answer:

After entering the interface. i.e., g0/0

The command to change it to switchport mode trunk is the command:

switchport mode trunk If you get an error that the trunk encapsulation is "Auto", you need to change it to 802.1Q protocol because Ciscos standard is ISL which is no longer used.

The command to change to 802.1Q is:

switchport trunk encapsulation dot1q

Question 20: What does "gateway of last resort is not set" mean?

Answer:

No default route has been configured yet

Question 21: What does * - candidate default mean?

Answer:

It means that a specific IP address has become the default route to go outside the network.Question 22: In the ipv4 header, what value indicates OSCP in the protocol field?

Answer:

89

Question 23: What is IEEE 802.1Q?

Answer:

It one of two main trunking protocols.The other is ISL but it is no longer used.

Question 24: Which layer does the router operate on?

Answer:

Layer 3 - Network Provides connectivity between end hosts on different networks (outside of LAN) Provides logical addressing (IP addresses)