What does SSID stand for?
SSID stands for Service Set Identifier. The name a wireless network broadcasts so clients can find and join it. Hiding the SSID is not a security measure, since it is easy to recover from client traffic; several SSIDs on one access point can map to separate VLANs for guests and staff.
The SSID is the name of a wireless network, the one shown in the list of available networks. It can be up to 32 characters long. Access points advertise it in beacon frames so that clients can find the network. Several access points can use the same SSID so that a device roams between them without the user noticing. Hiding the SSID stops it from appearing in the list, but the name still travels in other frames and is easy to capture, so hiding is not a security measure.
SSID in practice: an example
An office has six access points all broadcasting the SSID named for the company and a second SSID for guests. Staff walk from one floor to another without losing their connection, because each access point offers the same network name and security settings. Visitors join the guest SSID, which leads to an isolated network with internet access only.
What SSID is confused with
SSID vs BSSID: what is the difference?
The SSID is the network name, shared by all access points of that network. The BSSID is the MAC address of one access point's radio, which identifies exactly which device a client is connected to.
SSID vs Wi-Fi password: what is the difference?
The SSID identifies the network and is public. The passphrase, or the user's own credentials on an enterprise network, is what grants access.
Which exams cover SSID?
SSID is on the official CompTIA acronym list for two of the four exams covered here.
- Network+ N10-009: 2.0 (Network Implementation).
- A+ 220-1201 and 220-1202: 220-1202 2.0 (Security).
Each number is a CompTIA exam objective and the name in brackets is its domain. The exam puts the term in a scenario; it does not ask you to recite the expansion.
Check yourself: two practice questions
Written by CertSprint for this page. They are not taken from any exam.
1. A technician must tell which of four access points with the same network name a laptop is connected to. Which value shows this?
- The SSID
- The BSSID
- The DHCP lease time
- The DNS suffix
Show the answer
B. The BSSID. All four share the SSID. The BSSID is the unique MAC address of the radio the laptop is associated with.
2. A manager wants to secure the office Wi-Fi by hiding the SSID. What should the technician explain?
- Hiding the SSID encrypts the traffic
- A hidden SSID can still be discovered, so strong encryption and authentication are what protect the network
- Hidden networks cannot be joined by anyone
- Hiding the SSID doubles the speed
Show the answer
B. A hidden SSID can still be discovered, so strong encryption and authentication are what protect the network. The name is still sent in frames that any capture tool can read. Protection comes from WPA2 or WPA3 with a strong passphrase or enterprise authentication.
Sources: IEEE 802.11-2020: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications; NIST glossary: service set identifier; NIST SP 800-153, Guidelines for Securing Wireless Local Area Networks (WLANs). The acronym and its expansion come from CompTIA's official acronym lists, linked from each exam glossary above. The explanation, example and questions are CertSprint's own, checked against these sources on 11 November 2026.