642-892（Composite Exam），是CCNP的考試之一，內容包括：描述基本的 VoIP 網絡的實施學習關於擁塞網絡的優化思想；學習實施集成的 QoS 服務特性；學習實施 QoS 的自動配置；學習優化 WLAN 的管理和安全。目前考取最新CCNP有兩種方案：方案1:640-901 + 642-812 + 642-825 + 642-845；方案2:642-892 + 642-825 + 642-845。CCNP 持有者有安裝和配置 100 到 500 個或者更多節點的網絡和排查故障的能力；能夠管理核心網絡的運作，以及綜合應用網絡邊緣的集成語音，無線以及安全方面的內容。
部份考試內容如下：
1. If no metric is specified for the routes being redistributed into IS-IS, what metric value is assigned to the
routes?
A. 0
B. 1
C. 10
D. 20
Answer:A
2. Which three restrictions apply to OSPF stub areas? (Choose three.)
A. No virtual links are allowed.
B. The area cannot be a backbone area.
C. Redistribution is not allowed unless the packet is changed to a type 7 packet.
D. The area has no more than 10 routers.
E. No autonomous system border routers are allowed.
F. Interarea routes are suppressed.
Answer: ABE
3. Which three IP multicast related statements are true? (Choose three.)
A. Multicast addresses 224.0.1.0 through 238.255.255.255 are called globally scoped addresses. They
are used to multicast data between organizations and across the Internet.
B. The multicast address 224.0.0.1 is a globally scoped address that has been reserved for the Network
Time Protocol (NTP) by the IANA.
C. Multicast addresses 239.0.0.0 through 239.255.255.255 are called limited scope addresses. They are
constrained to a local group or organization.
D. Multicast addresses 224.0.0.5 and 224.0.0.6 are limited scoped addresses that have been reserved for
OSPF.
E. Multicast addresses 224.0.0.0 through 224.0.0.255 are used for network protocols on local LAN
segments. Because they are always transmitted with a Time to Live (TTL) of 1, they are never forwarded
by a router.
Answer:ACE