Cisco CCST-NETWORKING - Questions & Answers

The CIDR (Classless Inter-Domain Routing) notation for the subnet mask 255.255.252.0 is /22. This notation indicates that the first 22 bits of the IP address are used for network identification, and the remaining bits are used for host addresses within the network 1.
References:
Subnet Cheat Sheet ?24 Subnet Mask, 30, 26, 27, 29, and other IP Address CIDR Network References
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Subnet Mask to CIDR Notation: The given subnet mask is 255.255.252.0. To convert this to CIDR notation: Convert the subnet mask to binary: 11111111.11111111.11111100.00000000
Count the number of consecutive 1s in the binary form: There are 22 ones.
Therefore, the CIDR notation is /22.
References:
Understanding Subnetting and CIDR: Cisco CIDR Guide

Router
Theshow running-configcommand is used on a Cisco router to display the current operational settings that are actively configured in the router's RAM. This command outputs all the configurations that are currently being executed by the router, which includes interface configurations, routing protocols, access lists, and other settings. Unlikeshow startup-config, which shows the saved configuration that the router will use on the next reboot,show running-configreflects the live, current configuration in use.
References:
The information is supported by multiple sources that detail the use of Cisco commands, particularly theshow running-configcommand as the standard for viewing the active configuration on a Cisco device 123.
show running-config: This command displays the current configuration running on the router. It includes all the operational settings and configurations applied to the router. show protocols: This command shows the status of configured protocols on the router but not the entire configuration. show startup-config: This command displays the configuration saved in NVRAM, which is used to initialize the router on startup, but not necessarily the current running configuration. show version: This command provides information about the router's software version, hardware components, and uptime but does not display the running configuration.
References:
Cisco IOS Commands: Cisco IOS Commands

IPv6 addresses can be compressed by removing leading zeros and replacing consecutive groups of zeros with a double colon (::). Here's how to compress the address 2001:0db8:0000:0016:0000:001b:2000:0056:
Remove leading zeros from each segment: Replace the longest sequence of consecutive zeros with a double colon (::). In this case, the two consecutive zeros between the 16 and 1b: Thus, the most compressed valid format of the IPv6 address is 2001:db8:0:16::1b:2000:56.
References:
Cisco Learning Network
IPv6 Addressing (Cisco)

OSI model
During the data encapsulation process, theData Link layerof the OSI model is responsible for adding a header that contains MAC addressing information and a trailer used for error checking.The header typically includes the source and destination MAC addresses, while the trailer contains a Frame Check Sequence (FCS) which is used for error detection 1. The Data Link layer ensures that messages are delivered to the proper device on a LAN using hardware addresses and translates messages from the Network layer into bits for the Physical layer to transmit. It also controls how data is placed onto the medium and is received from the medium through the physical hardware.
References:
The OSI Model
The 7 Layers of Networking Explained in Plain English OSI Model - Network Direction Which layer adds both header and trailer to the data?
What is OSI Model | 7 Layers Explained - GeeksforGeeks

192.168.200.0/24 Network: This subnet includes all addresses from 192.168.200.0 to 192.168.200.255.

The /24 indicates a subnet mask of 255.255.255.0, which allows for 256 addresses. 192.168.199.13: This address is in the 192.168.199.0/24 subnet, not the 192.168.200.0/24 subnet. 192.168.200.13: This address is within the 192.168.200.0/24 subnet. ?92.168.201.13: This address is in the 192.168.201.0/24 subnet, not the 192.168.200.0/24 subnet.
192.168.1.13: This address is in the 192.168.1.0/24 subnet, not the 192.168.200.0/24 subnet.
References:
Subnetting Guide: Subnetting Basics

-1000BASE-T Cable: This refers to Gigabit Ethernet over twisted-pair cables (Cat 5e or higher).
-Connector: RJ-45 connectors are used for Ethernet cables, including those used for 1000BASE-T.
-Coax: Used for cable TV and older Ethernet standards like 10BASE2.
-RJ-11: Used for telephone connections.
-OS2 LC: Used for fiber optic connections.
References:
-Ethernet Standards and Cables: Ethernet Cable Guide

The AAA service security model consists of three components: Authentication, Authorization, and Accounting.
-Authentication: This is the process of verifying the identity of a user or device. It ensures that only legitimate users can access the network or service.-Authorization: This determines what an authenticated user is allowed to do or access within the network.
-Auditing/Accounting: This component tracks the actions of the user, including what resources they access and what changes they make.
Thus, the correct answer is C. Authentication.
References:
-Cisco AAA Overview
-Understanding AAA (Authentication, Authorization, and Accounting)

On a Cisco switch, a port with a blinking green LED typically indicates that the port is up (active) and is currently transmitting or receiving data. This is a normal state indicating active traffic on the port.
-A. Link is up with cable malfunctions: Usually indicated by an amber or blinking amber light.
-B. Link is up and not stable: Not typically indicated by a green blinking light.
-D. Link is up and there is no activity: Would be indicated by a solid green light withoutblinking.
Thus, the correct answer is C. Link is up and active.
References:
-Cisco Switch LED Indicators
-Cisco Ethernet Switch LED Patterns

The primary purpose of assigning an IP address to the management VLAN interface on a Layer 2 switch is to facilitate remote management of the switch. By configuring an IP address on the management VLAN, network administrators can access the switch's Command Line Interface (CLI) remotely using protocols such as Telnet or Secure Shell (SSH). This allows for convenient configuration changes, monitoring, and troubleshooting without needing physical access to the switch 1.

References:
-Understanding the Management VLAN
-Cisco - VLAN Configuration Guide
-Remote Management of Switches Assigning an IP address to the management VLAN interface (often the VLAN 1 interface by default) on a Layer 2 switch allows network administrators to remotely manage the switch using protocols such as Telnet or SSH. This IP address does not affect the switch's ability to route traffic between VLANs but provides a means to access and configure the switch through its Command Line Interface (CLI).
-A: The switch does not act as a default gateway
this is typically a function of a Layer 3 device like a
router.
-B: The switch does not resolve URLs
this is typically a function of DNS servers.
-C: The switch can relay DHCP requests but does not typically provide DHCP services
itself
this is usually done by a dedicated DHCP server or router.
Thus, the correct answer is D. To enable access to the CLI on the switch through Telnet or SSH.
References :
-Cisco VLAN Management Overview
-Cisco Catalyst Switch Management