Let's test your knowledge of frame relay, subinterfaces, packet filtering, and other important Cisco certification exam topics!
CCNA Certification And CCENT Certification:
The Frame Relay command frame-relay map is appropriate for which of the following interface types?
A. physical interface, no subinterfaces
B. point-to-multipoint subinterface
C. point-to-point subinterface
D. loopback
Answer: A, B. On a PTP subinterface, you should use the frame-relay interface-dlci command. You would not configure frame relay commands on a loopback interface.
CCNA Security Certification / CCNP ISCW Exam:
What's the main difference between stateful and stateless packet filtering?
Answer: Stateless packet filtering only considers the values in the ACL - there's no attempt to determine if this packet is part of an already-existing connection, or attempting to create one. With protocols that use random port numbers at times - FTP, for example - there can be some real problems establishing a connection.
Stateful packet filtering does monitor the connection state, and that's particularly important when it comes to preventing TCP attacks. A stateful firewall will not only monitor the state of the TCP connection, but also the sequence numbers. Stateful firewalls accomplish this by keeping a session table, or state table.
CCNP Certification / BSCI Exam:
Which of the following ISIS router types can an L1/L2 router not form an adjacency with?
A. L2 in a different area
B. L1 in a different area
C. L1/L2, regardless of area
D. L1, regardless of area
Answer: B, D. L1/L2 routers can form adjacency with any L1 in the same area, L1/L2 in any area, and L2 in any area.
CCNP Certification / BCMSN Exam:
Which of the following are Uplinkfast restrictions?
A. Takes 1 - 3 minutes to transition
B. Cannot be configured on a root switch
C. Cannot be configured on a per-VLAN basis
D. Does not run on Cisco switches without special IOS add-on
Answer: B, C. Uplinkfast takes seconds, not minutes, and there's no IOS "add-on".
CCNP / ONT Exam:
Cisco recommends that you disable compression if the CPU usage reaches what percentage?
Answer: 40%.
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Chris Bryant, CCIE #12933, is the owner of The Bryant Advantage, home of free CCNA Security tutorials.
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