nerdexam
Exams300-320Questions#702
Cisco

300-320 · Question #702

300-320 Question #702: Real Exam Question with Answer & Explanation

The correct answer is B: virtual switch model. The Virtual Switch Model (VSM) uses Cisco's Virtual Switching System (VSS) or equivalent multichassis EtherChannel (MEC) technology at the distribution layer, making two physical switches appear as a single logical switch. This design satisfies all three requirements: (1) STP is

Question

A network consultant must propose a scalable access-distribution model where an alternative to STP technology is used to prevent Layer 2 loops. The proposed model must include these features: - VLANs that span across the access switches - eliminate the need for a FHRP protocol - multichassis Ethernet technology to provide fast convergence in case of link failure Which design model does the consultant propose?

Options

  • Amultitier looped square access model
  • Bvirtual switch model
  • Cmultitier looped triangle access model
  • Drouted access model

Explanation

The Virtual Switch Model (VSM) uses Cisco's Virtual Switching System (VSS) or equivalent multichassis EtherChannel (MEC) technology at the distribution layer, making two physical switches appear as a single logical switch. This design satisfies all three requirements: (1) STP is not needed because loops cannot form across a logical single switch, replacing STP with an alternative; (2) VLANs can span across access switches connected to the virtual switch; (3) FHRP protocols like HSRP or VRRP are eliminated because the single logical switch has one IP gateway address; and (4) multichassis EtherChannel provides sub-second convergence on link failure. The routed access model uses Layer 3 at the access layer (incompatible with spanning VLANs), and looped models still rely on STP.

Community Discussion

No community discussion yet for this question.

Sign up to join the discussion
Full 300-320 Practice