Tag: cisco-ccna

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Questions Related to cisco-ccna

Multiple choice cisco-ccna

As a frame travels through a routed network the Mac address will always:

  1. the source address will change and the destination address will change

  2. change to reflect the current source and destination

  3. remain the same

  4. the source address will remain the same but the destination address will change

  5. none of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

To solve this question, the user needs to know about MAC addresses and how they work in a routed network.

MAC addresses are unique identifiers assigned to network interfaces by the manufacturer. Each MAC address is assigned to a specific device, and it is used to identify that device on a network.

In a routed network, packets are sent from one network to another through intermediate devices such as routers. As a packet travels through the network, the MAC address of the source and destination will change depending on the device it is passing through.

Now let's go through each option and explain why it is right or wrong:

A. The source address will change and the destination address will change: This option is incorrect because the source and destination MAC addresses will not always change. They may change as the packet passes through different devices in the network, but they may also remain the same in certain cases.

B. Change to reflect the current source and destination: This option is partially correct. The MAC address of the packet will change as it passes through different devices in the network. However, it is not changing to reflect the current source and destination, but rather to identify the device the packet is currently passing through.

C. Remain the same: This option is incorrect. While it is possible for the MAC address to remain the same in certain cases, it is not always the case.

D. The source address will remain the same but the destination address will change: This option is also partially correct. The source MAC address will not change, but the destination MAC address will change as the packet passes through different devices in the network.

E. None of the above: This option is incorrect because options B and D are partially correct.

Therefore, the correct answer is:

The Answer is: B or D (both are partially correct)

Multiple choice cisco-ccna

NVRAM is best described as:

  1. The source of commonly used configuration commands

  2. The primary source of the Cisco IOS

  3. A location to run the active configuration from

  4. A location to run the power on diagnostics from

  5. A location to store a backup copy of the router configuration file
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Non-Volatile RAM (NVRAM) is used in Cisco routers to store the startup-configuration file. Unlike system RAM, NVRAM retains its contents when the router is powered off or rebooted, ensuring the configuration persists.

Multiple choice cisco-ccna

Under what conditions will a router enter setup mode?

  1. By manually entering setup mode from the system load prompt

  2. By manually entering setup mode from the configuration load prompt

  3. If no configuration file can be found

  4. If the present configuration file is older than the one attempting to load

  5. By manually entering setup mode from the user prompt
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A Cisco router enters the interactive 'setup mode' automatically if it cannot find a valid configuration file in NVRAM during the boot process. This allows the administrator to perform a basic initial configuration via a guided dialogue.

Multiple choice cisco-ccna

Which answer describes the possible locations from which the operating system would be loaded at system initialization?

  1. NVRAM, TFTP Server, ROM

  2. NVRAM, TFTP Server, RAM

  3. TFTP Server, FTP Server, ROM

  4. Flash memory, TFTP Server, ROM

  5. NVRAM, Flash memory
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Cisco IOS can be loaded from three locations at boot: Flash memory (the primary storage for IOS images), a TFTP server (network boot for loading or recovery), and ROM (contains a limited IOS for emergency situations). NVRAM stores configuration, not IOS images.

Multiple choice cisco-ccna

Which of the following protocols is unacknowledged?

  1. SPX

  2. TCP

  3. Telnet

  4. UDP

  5. FTP
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

UDP is a connectionless, best-effort protocol that does not use acknowledgments - packets are sent without confirmation of receipt. In contrast, TCP, SPX, Telnet, and FTP all provide reliable, acknowledged delivery through connection-oriented mechanisms.

Multiple choice cisco-ccna

What is the default route on an IP network?

  1. The address of the nearest downstream neighbor in a Token ring network.

  2. At the router, it is the route used to direct frames for which the next hop has not been explicitly listed in the routing table.

  3. Any static route listing in a routing table.

  4. This is the route that will be chosen first by IP for delivery of a datagram.

  5. When all conditions are equal, the best route for delivery of IP datagrams.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A default route (often represented as 0.0.0.0/0) is the path used by a router when no specific match for a destination IP address is found in the routing table. It acts as a 'gateway of last resort' for outgoing traffic.

Multiple choice cisco-ccna

The Catalyst 5000 uses which switching mode?

  1. Cut-through

  2. Store and forward

  3. Fast switching
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The Catalyst 5000 series switches use store-and-forward switching as their primary mode. In store-and-forward, the entire frame is received and checked for errors before forwarding, which ensures error-free transmission at the cost of some latency. Cut-through switching forwards frames before they're completely received and is not the default for these switches.