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NEW QUESTION # 11
Which three factors must be considered when ordering a replacement power supply for an ICX7650? (Choose three.)
Answer: A,B,C
NEW QUESTION # 12
Which function is performed by ARP protocol?
Answer: B
Explanation:
The Address Resolution Protocol (ARP) is a fundamental protocol used in IP networking to map a device's IP address to its corresponding Media Access Control (MAC) address. This mapping is essential for enabling communication within a local network segment.
How ARP Works:
* ARP Request:
* When a device (Host A) needs to communicate with another device (Host B) on the same local network, it checks its ARP cache to see if it already has Host B's MAC address corresponding to its IP address.
* If the MAC address is not in the cache, Host A broadcasts an ARP request packet to all devices on the local network. This packet includes Host B's IP address and requests the MAC address associated with that IP.
* ARP Reply:
* Upon receiving the ARP request, the device with the matching IP address (Host B) responds with an ARP reply. This reply is sent directly to Host A and contains Host B's MAC address.
* Updating ARP Cache:
* Host A receives the ARP reply and updates its ARP cache with the new IP-to-MAC address mapping. This cached information allows for efficient communication without the need for repeated ARP requests.
Key Functions of ARP:
* IP to MAC Address Resolution:
* ARP's primary function is to resolve IP addresses to MAC addresses, enabling devices to locate each other on the same local network segment.
* Facilitating Data Link Layer Communication:
* By providing the necessary MAC address, ARP allows data packets to be correctly addressed and transmitted over the network's data link layer.
Clarifications on Other Options:
* Option B: Discover directly connected neighbors
* This function is typically performed by protocols like the Neighbor Discovery Protocol (NDP) in IPv6 or by network discovery tools, not by ARP.
* Option C: Build and maintain switch MAC tables
* Switches build and maintain MAC address tables by observing the source MAC addresses of incoming frames, a process independent of ARP.
* Option D: Resolve host name
* Resolving hostnames to IP addresses is the function of the Domain Name System (DNS), not ARP.
References:
* Understanding ARP (Address Resolution Protocol)
* How ARP Works
NEW QUESTION # 13
As an IP packet is routed across subnets, which value gets updated at each hop?
Answer: D
Explanation:
In network communications, when an IP packet traverses multiple subnets to reach its destination, certain header information is modified at each hop to facilitate proper routing and delivery.
* Destination MAC Address:
* Role: The Media Access Control (MAC) address is a hardware identifier used at the Data Link layer (Layer 2) of the OSI model.
* Update Process:
* As a packet moves from one router to the next, the destination MAC address is updated to reflect the MAC address of the next-hop device.
* This ensures that the packet is correctly forwarded at the Data Link layer within each local network segment.
* Explanation:
* When a router forwards a packet, it encapsulates the IP packet within a new Ethernet frame.
* The router sets the destination MAC address in this frame to the MAC address of the next- hop router or the final destination device if it is on the same local network.
* This process repeats at each hop, with each router updating the destination MAC address to ensure proper Layer 2 delivery.
* Other Header Fields:
* Destination IP Address:
* Remains unchanged throughout the packet's journey, ensuring end-to-end delivery to the correct device.
* Source IP Address:
* Also remains unchanged, identifying the original sender of the packet.
* Subnet Mask:
* Not a field within the packet header; it is used by routers to determine the network portion of an IP address but is not transmitted with the packet.
References:
* For a detailed understanding of how routers handle packet forwarding and the role of MAC addresses in this process, refer to the RUCKUS ICX Switch Configuration Guide, which provides insights into Layer 2 and Layer 3 forwarding mechanisms.
NEW QUESTION # 14
Which command can be used to identify Cyclic Redundancy Check (CRC) errors on port Ethernet 1/1/1?
Answer: D
NEW QUESTION # 15
What is the maximum distance between ICX devices in a stack?
Answer: C
Explanation:
RUCKUS ICX switches support stacking over both copper and fiber connections, allowing for flexible deployment across various distances:
* Copper Stacking Cables:
* Maximum Distance:
* Up to 5 meters using active direct-attach copper (DAC) cables.
* Use Case:
* Suitable for stacking switches within the same rack or in close proximity.
* Fiber-Optic Stacking Cables:
* Maximum Distance:
* Up to 40 kilometers using appropriate optical transceivers and single-mode fiber.
* Use Case:
* Ideal for stacking switches located in different buildings or across a campus environment.
References:
* For detailed information on stacking distances and supported optics, refer to the FastIron stacking distances and optics guide: FastIron stacking distances and optics by device By utilizing fiber-optic connections with appropriate transceivers, ICX switches can be stacked over substantial distances, providing flexibility in network design and deployment.
NEW QUESTION # 16
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