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NEW QUESTION # 49
A Cisco PoE switch is shown in the following image. Which type of port will provide both data connectivity and power to an IP phone?
Answer: C
Explanation:
In the provided image of the Cisco PoE switch, the ports identified with number 6 are the standard RJ-45 Ethernet ports typically found on switches that provide both data connectivity and Power over Ethernet (PoE).
PoE ports are designed to supply power to devices such as IP phones, wireless access points, and other PoE- enabled devices directly through the Ethernet cable.
Ports:
*2: Console port (for management and configuration)
*3 and 4: Specific function ports (often for management)
*6: RJ-45 Ethernet ports (capable of providing PoE)
*7: SFP ports (for fiber connections, typically do not provide PoE)
Thus, the correct answer is C. Ports identified with number 6.
References :=
*Cisco Catalyst 2960-L Series Switches Data Sheet
*Cisco PoE Overview
NEW QUESTION # 50
A network administrator can successfully ping the URL www.cisco.com, but cannot ping a corporate server located at a remote branch in another city.
You need to identify the specific router where packets are being dropped in the path to the remote branch.
Which utility should you use?
Answer: B
Explanation:
Traceroute is a network diagnostic utility used to identify the sequence of routers that packets traverse between a source device and a destination.
It is particularly useful for investigating routing failures, connectivity interruptions, and unreachable remote networks.
Traceroute operates by transmitting probe packets with progressively increasing IP Time-to-Live (TTL) values.
The first probe uses a TTL value of 1, causing the first router to return an ICMP Time Exceeded message.
Subsequent probes increase the TTL to discover additional routers along the network path.
By examining the responding routers and their associated round-trip times, administrators can identify where responses stop or connectivity becomes unreliable.
For example, on Cisco IOS:
traceroute 192.168.50.10
On Windows, the equivalent utility is:
tracert 192.168.50.10
Why the other options are incorrect:
A). netstat: Displays network connections, socket information, and protocol statistics.
B). telnet: Establishes a TCP connection to a remote service and can test TCP port accessibility.
C). ipconfig: Displays and manages local IP configuration information on Windows.
D). traceroute: Discovers intermediate network hops and helps isolate routing problems.
Important distinction: A nonresponding hop is not definitive proof of packet loss at that router, because ICMP responses may be filtered or rate-limited. Traceroute identifies potential failure points for further investigation.
References:
Cisco Certified Support Technician Networking (100-150) - Network Troubleshooting, Diagnostic Commands and Network Connectivity.
Cisco, Use the Traceroute Command on Operating Systems.
Cisco, Understand the Extended Ping and Extended Traceroute Commands.
NEW QUESTION # 51
Move each protocol from the list on the left to its correct example on the right.
Answer:
Explanation:
Explanation:
The correct matching of the protocols to their examples is as follows:
* DHCP : Assign the reserved IP address 10.10.10.200 to a web server at your company.
* DNS : Perform a query to translate companypro.net to an IP address.
* ICMP : Perform a ping to ensure that a server is responding to network connections.
Here's how each protocol corresponds to its example:
* DHCP (Dynamic Host Configuration Protocol) is used to assign IP addresses to devices on a network. In this case, DHCP would be used to assign the reserved IP address 10.10.10.200 to a web server.
* DNS (Domain Name System) is used to translate domain names into IP addresses. Therefore, to translate companypro.net to an IP address, DNS would be utilized.
* ICMP (Internet Control Message Protocol) is used for sending error messages and operational information indicating success or failure when communicating with another IP address. An example of this is using the ping command to check if a server is responding to network connections.
These protocols are essential for the smooth operation of networks and the internet.
* Perform a query to translate companypro.net to an IP address .
* DNS (Domain Name System) : DNS is used to resolve domain names to IP addresses.
* Assign the reserved IP address 10.10.10.200 to a web server at your company .
* DHCP (Dynamic Host Configuration Protocol) : DHCP is used to assign IP addresses to devices on a network.
* Perform a ping to ensure that a server is responding to network connections .
* ICMP (Internet Control Message Protocol) : ICMP is used by network devices to send error messages and operational information, and it is the protocol used by the ping command.
* DNS (Domain Name System) : DNS translates human-friendly domain names like " companypro.net " into IP addresses that computers use to identify each other on the network.
* DHCP (Dynamic Host Configuration Protocol) : DHCP automatically assigns IP addresses to devices on a network, ensuring that no two devices have the same IP address.
* ICMP (Internet Control Message Protocol) : ICMP is used for diagnostic or control purposes, and the ping command uses ICMP to test the reachability of a host on an IP network.
:
DNS Basics: What is DNS?
DHCP Overview: What is DHCP?
ICMP and Ping: Understanding ICMP
NEW QUESTION # 52
What is the function of DNS in a network when users attempt to access websites using domain names instead of IP addresses?
Answer: C
Explanation:
DNS resolves human-readable domain names into IP addresses, allowing users to access websites without memorizing numerical addresses, making internet navigation more user-friendly.
NEW QUESTION # 53
You have two switches that are connected as shown in the image.
Refer to the switch topology diagram supplied in the question.
The laptop is connected to port A on the first switch. The second switch is connected to port D on the first switch.
The laptop sends a broadcast frame to the first switch.
You need to identify the ports through which the broadcast frame is forwarded.
Which ports should you identify?
Answer: B
Explanation:
Ethernet switches operate primarily at Layer 2 of the OSI model and use MAC addresses to determine how Ethernet frames should be forwarded.
A broadcast Ethernet frame uses the destination MAC address FF:FF:FF:FF:FF:FF, indicating that the frame is intended for all devices within the same Layer 2 broadcast domain.
When the laptop sends a broadcast frame into port A, the first switch receives the frame and performs broadcast flooding.
Under normal switching operation, the switch forwards the broadcast frame through every eligible forwarding port in the same VLAN, except the port on which the frame was received.
In the supplied topology:
* Port A: Receives the broadcast frame and does not forward it back toward the laptop.
* Port B: Forwards the broadcast frame.
* Port C: Forwards the broadcast frame.
* Port D: Forwards the frame toward the second switch.
The second switch can subsequently flood the frame through its eligible ports belonging to the same VLAN.
Why the other options are incorrect:
A). Excludes ports B and C.
B). Excludes port D, which connects to the second switch.
D). Incorrectly includes the originating port A and excludes port C.
Therefore, Option C correctly identifies the forwarding ports, assuming all indicated ports belong to the same VLAN and are in a forwarding state.
References:
Cisco Certified Support Technician Networking (100-150) - Domain 4.0: Infrastructure, Objective 4.5:
Explain Basic Switching Concepts.
Cisco - Troubleshooting LAN Switching Environments, Frame Forwarding and Broadcast Flooding.
Cisco - Unicast Flooding in Switched Campus Networks, Layer 2 Forwarding Tables and VLAN Broadcast Domains.
NEW QUESTION # 54
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