Cisco CCST-NETWORKING Exam Questions & Answers

Correct Answer: C

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 detection1. 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

Correct Answer: B

When prioritizing trouble tickets, the most critical issues affecting business operations or high-impact activities should be addressed first. Here's a breakdown of the tickets:

Ticket 1: Relocation of a printer, while necessary, is not urgent and does not impact critical operations.

Ticket 2: An ongoing webinar losing internet access is critical, especially if the webinar is time-sensitive and involves multiple participants. Ticket 3: Slower response time for a cloud-based application is important but typically not as urgent as

a complete loss of internet access for a live event. Ticket 4: Wireless access down in the cafeteria affects users but does not have the same immediate impact as a live webinar losing connectivity. Thus, the correct answer is B. Ticket 2: An

online webinar is taking place in the conference room. The video conferencing equipment lost internet access.

References:

IT Help Desk Best Practices

Prioritizing IT Support Tickets

Correct Answer: A

WPA2-Personal, also known as WPA2-PSK (Pre-Shared Key), is the wireless security option that uses a pre-shared key to authenticate clients. This method is designed for home and small office networks and doesn't require an

authentication server. Instead, every user on the network uses the same key or passphrase to connect.

References:

-What is a Wi-Fi Protected Access Pre-Shared Key (WPA-PSK)?

-Exploring WPA-PSK and WiFi Security

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-WPA2-Personal: This wireless security option uses a pre-shared key (PSK) for authentication. Each client that connects to the network must use this key to gain access. It is designed for home and small office networks where simplicity and

ease of use are important.

-WPA2-Enterprise: Unlike WPA2-Personal, WPA2-Enterprise uses 802.1x authentication with an authentication server (such as RADIUS) and does not rely on a pre-shared key. -802.1x: This is a network access control protocol for LANs,

particularly wireless LANs. It provides an authentication mechanism to devices wishing to attach to a LAN or WLAN. -802.1q: This is a networking standard that supports VLAN tagging on Ethernet networks and is not related to wireless

security.

References:

Cisco Documentation on WPA2 Security: Cisco WPA2 Understanding Wireless Security: Wireless Security Guide