EXECUTIVE SUMMARY

The Cisco Business 350 Series Managed Switch platform delivers a hardened physical and logical security posture coupled with industry-leading power efficiency for small office and branch deployments. This datasheet details the hardware-anchored security mechanisms—including Trustworthy Systems runtime defenses, IEEE 802.1X port authentication, and comprehensive threat mitigation controls—that protect business-critical transactions without requiring dedicated security appliances. Simultaneously, the platform integrates IEEE 802.3az Energy Efficient Ethernet, automatic port power shutoff, cable-length-based signal optimization, and fanless thermal design in most models to minimize operational expenditure and environmental footprint.

HARDWARE ARCHITECTURE & SILICON

The Cisco Business 350 Series is built upon a fixed-configuration switching ASIC architecture with an 800 MHz ARM processor, 512 MB RAM, and 256 MB flash memory, providing deterministic forwarding for Layer 2 and Layer 3 workloads. Physical security is rooted at the silicon level through the Trustworthy Systems framework, which implements Executable Space Protection (X-Space), Address Space Layout Randomization (ASLR), and Built-In Object Size Checking (BOSC) to defend against runtime exploitation attempts. The hardware chassis is available in rack-mountable 1RU form factors with internal power supplies, and most non-PoE-heavy models employ a fanless design that eliminates a common physical attack vector while reducing acoustic signature and mechanical failure points.

KEY FEATURES & SECURITY LOGIC

PHYSICAL AND PORT-LEVEL SECURITY

- Port Security: Locks source MAC addresses to specific interfaces and limits the maximum number of learned MAC addresses per port, preventing unauthorized device attachment and MAC flooding attacks.

- IEEE 802.1X Authentication: Supports authenticator role with RADIUS authentication and accounting, guest VLAN, unauthenticated VLAN, single/multiple host modes, and time-based 802.1X policies for granular access control.

- Private VLAN and Protected Ports: Provides Layer 2 isolation between switch ports within the same VLAN, preventing peer-to-peer traffic snooping while supporting multiple uplinks.

NETWORK INFRASTRUCTURE DEFENSE

- DHCP Snooping: Filters DHCP messages from untrusted interfaces to prevent rogue DHCP server injection.

- IP Source Guard (IPSG): Discards packets with spoofed source IP addresses not statically configured or dynamically learned via DHCP snooping.

- Dynamic ARP Inspection (DAI): Validates ARP packets against the IP/MAC binding table to block man-in-the-middle attacks.

- BPDU Guard and STP Loop Guard: Shuts down ports receiving unauthorized BPDUs and prevents Layer 2 forwarding loops from propagating across the topology.

- Storm Control: Rate-limits broadcast, multicast, and unknown unicast traffic to preserve control-plane availability.

POWER EFFICIENCY ARCHITECTURE

- IEEE 802.3az Energy Efficient Ethernet: Monitors link utilization and transitions active links to a sleep state during low-traffic periods, reducing baseline power draw without compromising forwarding latency.

- Automatic Port Power Shutoff: Cuts power to ports when link status is down, eliminating phantom energy consumption.

- Cable-Length Signal Optimization: Embedded intelligence adjusts signal strength based on the physical cable length, avoiding unnecessary transmit power overhead.

- Fanless Design: Most models operate without active cooling fans, reducing total power consumption, increasing mean time between failures, and enabling silent operation in open office environments.

COMPLIANCE & STANDARDS

The Cisco Business 350 Series adheres to IEEE 802.3, 802.3u, 802.3ab, 802.3z, 802.3ae, 802.3an, 802.3ad (LACP), 802.3x, 802.3az, 802.1D/w/s, 802.1Q/p, 802.1X, 802.3af, 802.3at, and 802.1AB. The platform is certified for USGv6 and IPv6 Gold Logo compliance, with full IPv6 first-hop security including DHCPv6 Guard and Neighbor Binding Integrity. Safety certifications include UL 60950 and CSA C22.2.

TECHNICAL SPECIFICATIONS

ORDERING SKU INFORMATION

Representative SKUs within the Cisco Business 350 Series include: CBS350-8T-E-2G (8 Gigabit Ethernet ports, 2 combo uplinks), CBS350-24P-4G (24 PoE+ ports, 195W budget, 4 SFP uplinks), CBS350-48P-4G (48 PoE+ ports, 370W budget, 4 SFP uplinks), and CBS350-16XTS (8 10GE copper ports, 8 10G SFP+ uplinks). All models ship with rack-mounting kits and are backed by a limited lifetime hardware warranty.