300-625 Configuring Cisco MDS 9000 Series Switches (DCSAN) Practice Questions
Prepare for 300-625 with more than an answer.
- Exam fee
- $300 USD
- Level
- Professional
- Valid for
- 3 years
Domains covered on the exam 4
- Deployment15%
- Implementation35%
- Management and Monitoring25%
- MDS Troubleshooting25%
- 1
You are troubleshooting a slow-drain issue in a large fabric. DCNM analytics indicate 'Credit Loss' on an ISL. What is the most immediate consequence of Credit Loss on a Fibre Channel interface?
Show answer details
Correct answer: B
Fibre Channel uses buffer-to-buffer credits (B2B). If credits are lost (due to bit errors or corruption) and not returned, the sender's counter hits zero. It halts transmission indefinitely (or until credit recovery kicks in), causing a massive performance impact.
- 2
A network engineer is configuring a new Cisco MDS switch for a highly secure environment. They need to ensure that administrative access is strictly controlled. Which two protocols can be configured to provide centralized Authentication, Authorization, and Accounting (AAA) services? (Select TWO)
Show answer details
Correct answer: C, D
RADIUS is a standard protocol supported by MDS for AAA services.
TACACS+ is a Cisco-proprietary protocol (now open standard) widely used for granular command authorization and accounting.
- 3
You are designing a Fibre Channel over IP (FCIP) solution to connect two data centers. The link has a high Round Trip Time (RTT) of 100ms. Which FCIP feature should be enabled to maximize throughput for write-intensive applications by acknowledging write frames locally?
Show answer details
Correct answer: C
Write Acceleration (WA) spoofs the transfer ready and acknowledgement frames locally, allowing the host to send data at line rate without waiting for the ACK from the remote storage array across the high-latency link.
- 4
When configuring a Cisco MDS switch for Inter-VSAN Routing (IVR) without using NAT, what is the critical constraint regarding Domain IDs across the participating VSANs?
Show answer details
Correct answer: C
In IVR without NAT, the source FCID is preserved. If VSAN A and VSAN B both use Domain ID 10, a packet from 10.1.1 in VSAN A routing to VSAN B would appear to come from 10.1.1, which conflicts with local Domain 10 in VSAN B. Thus, Domain IDs must be unique across the IVR topology.
- 5
A storage admin observes that a zone merge has failed between two switches. The error log indicates 'Zone Merge Failure - Content Mismatch'. What is the most common cause of this specific error?
Show answer details
Correct answer: A
In Basic Zoning, if two switches merge and both have an active zone set with the same name, the content (zones and members) must be identical. If they differ, the merge fails to prevent data access violation.
- 6
Which two steps are mutual between Cisco secure boot and UEFI secure boot? (Choose two.) A.bootloaderB.operating systemC.microloaderD.kemelE.hardware anchor
Show answer details
Correct answer: A, B
- 7
Which feature on MDS platforms ensures that the code that is running on the hardware platform is authentic and unmodified, while also validating the BIOS to eliminate any rootkits. A.Cisco Secure BootB.UEFI Secure BootC.Secure Unique Device IdentifierD.BIOS Secure Boot
Show answer details
Correct answer: A
- 8
Which component is initially responsible for loading the kickstart image on Cisco MDS Switches? A.ROMMONB.BIOSC.NX-OSD.BASH
Show answer details
Correct answer: C
