Cisco Systems, commonly known simply as Cisco, is an American multinational technology company best known for networking hardware, cybersecurity, enterprise software, collaboration tools, and IT infrastructure. It is one of the companies most closely associated with the development and commercialization of modern computer networking and the Internet.

The company is headquartered in San Jose, California, in the heart of Silicon Valley. Cisco was incorporated in California in 1984 and later reincorporated in Delaware in 2021.

Today, Cisco describes its mission in terms of helping organizations connect and protect themselves in the AI era. Its portfolio spans networking, security, collaboration, observability, cloud management, and related services.

Item	Information
Full name	Cisco Systems, Inc.
Common name	Cisco
Founded	1984
Founders	Leonard Bosack and Sandy Lerner
Industry	Information technology / networking
Headquarters	San Jose, California, U.S.
CEO & Chair	Chuck Robbins
Stock ticker	NASDAQ: CSCO
Primary markets	Enterprise IT, networking, cybersecurity, cloud, collaboration, observability
Fiscal 2025 revenue	US$56.7 billion
Fiscal year 2025 operating cash flow	US$14.2 billion
Purpose	“Power an Inclusive Future for All”
Major acquisition	Splunk, completed 2024
Core historical identity	Networking and Internet infrastructure

Cisco’s fiscal 2025 revenue was approximately $56.7 billion, up 5% year over year. 1

What is Cisco?

Cisco is primarily an enterprise technology company. Unlike consumer-focused technology companies such as Apple or Samsung, Cisco historically has not been centered on products that ordinary consumers purchase directly. Instead, its customers are organizations that need large-scale, reliable IT infrastructure.

These include:

• Banks and financial institutions
• Telecommunications companies
• Governments
• Universities
• Hospitals
• Manufacturers
• Retailers
• Technology companies
• Cloud and Internet providers
• Large multinational corporations
• Small and medium-sized businesses

Cisco supplies the technology that allows these organizations to connect computers, servers, users, applications, data centers, offices, and cloud environments. Its 2025 annual report describes its customers as businesses of all sizes, public institutions, governments, service providers, and large web-scale providers.

In simple terms, Cisco helps organizations build, connect, secure, monitor, and manage their digital infrastructure.

Origins and History

Cisco was founded in 1984 by Leonard Bosack and Sandy Lerner, two Stanford University computer scientists. The name Cisco comes from San Francisco. The company’s early branding even incorporated an image inspired by the Golden Gate Bridge.

The company emerged from an important networking problem: different computer networks needed a way to communicate with one another. At the time, networks could be relatively isolated. Cisco helped popularize technology that allowed different networks to communicate using Internet Protocol (IP). This became the foundation of Cisco’s long-term business.

Cisco became enormously important during the growth of the commercial Internet. Its most important early technology was the router. A router determines where packets of data should go between different networks. For example, when a computer communicates with a server somewhere else on the Internet, information is broken into packets. Routers examine those packets and determine where they should be forwarded.

Cisco’s networking equipment became widely deployed by Internet service providers, universities, corporations, governments, telecommunications companies, and data centers. This helped make Cisco one of the defining technology companies of the Internet era.

During the 1990s, the Internet expanded rapidly. Businesses increasingly needed local-area networks, wide-area networks, Internet connections, routers, switches, network management, and security. Cisco was positioned directly in the middle of this expansion. The company’s business grew dramatically as organizations built increasingly sophisticated networks.

Cisco became one of the most valuable technology companies during the dot-com era. Its market capitalization briefly reached extraordinary levels around the turn of the millennium, making Cisco one of the world’s most valuable publicly traded companies. The dot-com crash subsequently caused a dramatic decline in technology valuations, but Cisco remained a major networking company.

Business Portfolio

Cisco’s business has evolved considerably. Historically, people associated Cisco primarily with routers and switches. Today, Cisco is much broader. Its major technology categories include:

1. Networking
2. Cybersecurity
3. Collaboration
4. Observability
5. Cloud management
6. Data-center infrastructure
7. Services
8. AI infrastructure and related technologies

Cisco’s own annual reporting groups its portfolio around networking, security, collaboration, and observability, while its broader current portfolio also emphasizes cloud management and AI. 2

Networking

Networking remains Cisco’s historical core.

Routers: Cisco routers connect different networks and are particularly important in large enterprise, telecommunications, and Internet-provider environments. Examples include infrastructure used to connect corporate branches, data centers, cloud environments, Internet service providers, and large-scale networks.

Switches: Cisco switches connect devices within networks. A typical enterprise might use switches to connect PCs, servers, wireless access points, IP phones, printers, security appliances, and other network equipment. Cisco’s switching business has historically been one of its largest and most important businesses.

Wireless networking: Cisco also sells enterprise Wi-Fi infrastructure, including wireless access points and management systems. This allows companies to operate large wireless networks across offices, campuses, universities, hospitals, retail locations, and industrial facilities.

Key Product Families:

• Cisco Catalyst: One of Cisco’s best-known enterprise networking product families. Catalyst products have traditionally included Ethernet switches, routers, wireless networking, and network-management technologies. The Catalyst brand is particularly associated with enterprise campus networking. For many IT professionals, a “Cisco network” historically meant an environment containing Catalyst switches and Cisco routers.
• Cisco Nexus: Focuses heavily on data-center networking. Data centers have different requirements from ordinary office networks because they need to handle huge numbers of servers, high-speed data transfers, virtual machines, cloud workloads, storage, and AI workloads. Cisco Nexus products are designed for these environments.
• Silicon One: One of Cisco’s important technology developments is Silicon One, its networking silicon architecture. Rather than relying entirely on third-party networking chips, Cisco has invested heavily in its own high-performance networking silicon. Cisco increasingly positions Silicon One as an important foundation for high-bandwidth networking and AI-era infrastructure. Its 2026 investor materials specifically highlight networking powered by Silicon One. 3 This matters because AI workloads can create enormous requirements for network bandwidth. Large AI systems may involve thousands of processors communicating with one another, making high-performance networking increasingly important.

Cybersecurity

Cisco has transformed itself from primarily a networking company into a major cybersecurity provider. Its security portfolio covers areas such as network security, firewalls, secure access, identity, endpoint security, cloud security, threat detection, security analytics, and security operations. Cisco’s security strategy increasingly emphasizes integrating security with networking rather than treating security as a collection of isolated products.

Key Security Solutions:

• Cisco Secure Firewall: Part of Cisco’s security portfolio. It provides organizations with firewall and network-security capabilities designed to control and inspect network traffic. Historically, firewalls were often deployed as separate security appliances. Cisco’s broader strategy is increasingly to integrate security capabilities across the network, cloud, and endpoint environment.
• Cisco Umbrella: A cloud-delivered security service. It can provide security functions such as DNS-layer protection, secure Internet access, threat intelligence, and visibility into Internet activity. The broader concept is that security protection can be delivered through cloud infrastructure rather than requiring every security function to reside inside a company’s physical data center.
• Cisco Duo: Particularly associated with identity and multi-factor authentication (MFA). It helps organizations verify that users attempting to access applications and systems are actually authorized. This became increasingly important as companies adopted cloud applications, remote work, hybrid work, and zero-trust security models. Duo is one example of Cisco’s shift from traditional network security toward identity-centric security.

Collaboration

Cisco also operates a major enterprise collaboration business. The most famous product in this area is Webex. Webex provides tools for video meetings, online meetings, voice communications, team messaging, calling, contact centers, and enterprise collaboration. Cisco entered the collaboration market partly through its acquisition of WebEx Communications in 2007. This was strategically important because Cisco wanted to expand beyond the physical network into the applications and communications taking place across that network.

Webex became especially important during the global shift toward remote and hybrid work. Companies could use Webex for employee meetings, customer meetings, remote collaboration, online presentations, and enterprise communications. This placed Cisco in competition with companies and platforms such as Microsoft Teams and Zoom.

Observability and AI

Another increasingly important area for Cisco is observability. Observability is the ability to understand what is happening inside complex technology systems by analyzing data generated by those systems. For example, an IT team might want to know why an application is running slowly. The answer might involve the application, a server, a database, a cloud service, a network connection, or a security control. Observability attempts to provide visibility across those layers.

One of the most important developments in modern Cisco history was its acquisition of Splunk. Cisco completed its acquisition of Splunk in 2024. Splunk specializes in collecting and analyzing machine-generated data, including logs, security events, application data, and infrastructure telemetry. This complements Cisco’s huge network and security footprint. The strategic idea is powerful: Cisco provides the infrastructure → Cisco observes the infrastructure → Splunk analyzes the data → security and IT teams can respond. Cisco’s 2025 reporting specifically discusses integrating Splunk telemetry into its cybersecurity strategy.

The acquisition therefore represents a major change in Cisco’s identity. Cisco is no longer simply a company that builds networks. It increasingly wants to be a company that helps organizations build, secure, observe, analyze, and automate their entire digital infrastructure.

AI has become a major strategic priority for Cisco. AI requires enormous amounts of computing power, networking bandwidth, data, storage, security, and monitoring. Modern AI data centers may contain huge clusters of GPUs and other accelerators. Those systems need extremely high-speed networks to communicate. Cisco therefore sees itself as an important provider of the infrastructure surrounding AI. Its current strategy emphasizes AI-powered networking, security, observability, and infrastructure. Cisco has also described newer initiatives around AI-native security and infrastructure for AI factories.

Revenue Structure

Cisco traditionally made much of its money by selling hardware. Over time, this model has changed. Cisco increasingly combines hardware, software, subscriptions, support, cloud services, and professional services. This produces recurring revenue and gives Cisco a longer-term relationship with customers. By fiscal 2025, Cisco reported that subscriptions represented more than half of its revenue.

Cisco’s fiscal 2025 revenue mix was approximately:

Category	Share of revenue
Networking	50%
Services	27%
Security	14%
Collaboration	7%
Observability	2%

Cisco generated approximately $56.7 billion in total fiscal 2025 revenue. This demonstrates that networking remains Cisco’s largest business even as the company expands into security, software, and observability.

For fiscal 2025, key financial figures include:

• Revenue: $56.7 billion
• Product revenue: $41.6 billion
• Services revenue: $15.0 billion
• Operating cash flow: $14.2 billion
• Gross margin: 64.9%
• Operating margin: 20.8%

Cisco also returned approximately $12.4 billion to shareholders through dividends and share repurchases in fiscal 2025.

Stock and Leadership

Cisco is publicly traded on the NASDAQ under the ticker CSCO. It is widely followed by investors because it is one of the world’s largest established enterprise technology companies. Cisco is also notable as a relatively mature technology company: unlike many high-growth software startups, it generates substantial cash flow and returns significant capital to shareholders.

Chuck Robbins is Cisco’s Chair and Chief Executive Officer. He became CEO in 2015, succeeding John Chambers. Under Robbins, Cisco has increasingly emphasized software, subscriptions, cybersecurity, cloud, recurring revenue, observability, AI, and strategic acquisitions. Cisco’s current investor materials identify Robbins as Chair and CEO and position the company’s strategy around infrastructure for the AI era.

Before Robbins, John Chambers was one of the most recognizable technology CEOs in the world. Chambers led Cisco for approximately two decades. His tenure coincided with enormous Internet expansion. Cisco under Chambers became famous for aggressively acquiring technology companies and expanding beyond traditional routers. The company became a major symbol of the networking and Internet economy.

Geographic Reach

Cisco operates globally. Its reporting divides its business geographically into:

• Americas
• Europe, Middle East and Africa (EMEA)
• Asia Pacific, Japan and China (APJC)

In fiscal 2025, approximately 59% of Cisco revenue came from the Americas, 26% from EMEA, and 14% from APJC. Cisco therefore has a substantial presence in Asia, including Singapore and other major technology markets.

Customers and Partners

Cisco’s customer base is extremely broad, encompassing enterprises, governments, universities, telecommunications companies, cloud and Internet companies, and small and medium businesses.

Cisco does not sell everything directly. A substantial portion of its products and services is sold through channel partners, including resellers, distributors, systems integrators, service providers, and IT consultants. Cisco’s partner ecosystem is therefore a major component of its business model. This is particularly important for large IT projects, where a corporation might purchase Cisco technology through an IT integrator that also designs and implements the entire network.

Acquisitions

Acquisitions have played a huge role in Cisco’s expansion. Notable examples include:

Acquisition	Approx. year	Strategic significance
Crescendo Communications	1993	Switching
Cerent	1999	Optical networking
Linksys	2003	Consumer networking
Scientific Atlanta	2005	Video / cable infrastructure
WebEx	2007	Collaboration
Meraki	2012	Cloud-managed networking
Sourcefire	2013	Cybersecurity
AppDynamics	2017	Application performance
Duo Security	2018	Identity/security
ThousandEyes	2020	Network/cloud visibility
Splunk	2024	Security, observability, data analytics

The Splunk acquisition was particularly significant because of its scale and its potential to combine Cisco’s networking/security infrastructure with Splunk’s data and analytics capabilities.

Meraki is another important Cisco acquisition. Meraki pioneered a more cloud-oriented approach to network management. Traditional enterprise networking often required network engineers to configure individual devices. Cloud-managed networking allows administrators to manage equipment through centralized cloud interfaces. This model became increasingly attractive to organizations with many branch offices, distributed employees, retail locations, schools, and small IT teams. Cisco acquired Meraki in 2012.

Brand Identity

Cisco’s brand is strongly associated with networking, enterprise IT, reliability, and security. Among IT professionals, Cisco has historically been considered one of the most recognizable infrastructure brands. Its brand is particularly strong in enterprise networking, network engineering, telecommunications, IT certifications, cybersecurity, and data-center infrastructure. Cisco’s influence extends beyond products into professional education.

The logo features vertical lines representing the Golden Gate Bridge, connecting the brand to San Francisco. This is also reflected in the company’s name: San Francisco → Cisco.

Certifications and Career Impact

One of Cisco’s most important contributions to the IT industry is its professional certification ecosystem. The best-known certification is CCNA (Cisco Certified Network Associate), which is widely recognized as an entry-level/intermediate networking certification. Other Cisco certifications include advanced professional and expert-level credentials. The most famous is CCIE (Cisco Certified Internetwork Expert), which is considered one of the prestigious technical certifications in networking. Cisco’s certification program has helped create a global community of network engineers familiar with Cisco technologies.

Many IT professionals began their careers learning IP addressing, routing, switching, VLANs, OSPF, BGP, network security, and Cisco IOS. As a result, Cisco terminology and technologies became deeply embedded in enterprise networking education. Even professionals who eventually work with other vendors often encounter Cisco concepts early in their careers.

Technical Foundations

One of Cisco’s historically important technologies is Cisco IOS, its network operating-system family. IOS allows administrators to configure and manage networking equipment. For example, network engineers can configure interfaces, routing, VLANs, access controls, network protocols, and security settings. Cisco later developed other operating systems, including IOS XE, IOS XR, and NX-OS, designed for different networking environments.

Corporate Purpose and Sustainability

Cisco’s current corporate purpose is “Power an Inclusive Future for All.” Cisco says this purpose is expressed through areas including community resilience, its people, responsible innovation, and energy and sustainability.

Cisco has sustainability initiatives involving areas such as energy efficiency, renewable energy, circular economy, product design, emissions reduction, and responsible supply chains. This is increasingly relevant because networking and data-center infrastructure consume substantial amounts of electricity. AI infrastructure makes energy efficiency even more important.

Cisco’s history can be summarized in several phases:

1. Networking (1980s–1990s): Cisco establishes itself as a major router company.
2. Internet infrastructure (1990s–2000s): Cisco becomes one of the defining companies of the commercial Internet.
3. Unified communications (2000s): Cisco expands into voice, video, and collaboration.
4. Security and cloud (2010s): Cisco expands heavily into cybersecurity, cloud-managed networking, and software.
5. Platform strategy (2020s): Cisco increasingly combines networking, security, observability, collaboration, and analytics.
6. AI infrastructure (Mid-2020s onward): Cisco positions networking, security, and observability as foundational infrastructure for AI.

This evolution reflects the transition from a traditional networking vendor toward a broader technology platform. Cisco’s own current investor materials describe the company as a technology leader focused on helping organizations connect and protect themselves in the AI era.

A useful way to understand Cisco is to picture a large company where Cisco sits underneath much of the digital infrastructure, connecting employees, servers, and devices via routers and switches, while providing layers of security, observability (including Splunk), and support for AI applications.

1. Cisco Systems Inc. – Investor Relations
2. csco-20251027
3. Fiscal 2025 highlights