CIW Internetworking Professional考题回忆
1.Which extension header uses a variable-length Initialization vector (IV)?
A.Authentication.
B.Fragment.
C.Encrypted security payload.
D.Routing.
2.Which header field was created for packets that require special heading by IPv6 routers?
A.The flow label field.
B.The next header field.
C.The protocol field.
D.The payload length field.
3.In IPv6, what does the Site-Level Aggregator identify?
A.Individual locations.
B.Backbone providers.
C.Server location
D.ISPs.
4.Within the Encrypted Security payload (ESP) extension header, which of the following identifies the encryption association?
A.Security Parameters Index (SPI)
B.Payload Type.
C.Padding.
D.Sequence Number.
5.Why were checksums eliminated from IPv6?
A.To introduce alternative error checking.
B.To accommodate different topologies.
C.To increase packet processing speed.
D.To increase MTU discovery over networks.
6.Which of the following choices lists the recommended sequence of IPv6 extension headers?
A.Destination options, authentication, Hop-by-Hop, routing.
B.Hop-by-hop, routing, destination options, authentication.
C.Destination options, routing, hop-by-hop, authentication.
D.Hop-by-hop, destination options, routing, authentication.
7.What is the address prefix in binary for multicast addresses?
A.1111 1110 11
B.1111 1111
C.0000 010
D.1111 1110 10
8.Why was the IPv6 Time To Live (TTL) filed changed to the Hop Limit field in IPv6?
A.TTL is measured in milliseconds, whereas most routers route packets in nanoseconds.
B.TTL is measured in milliseconds, whereas most routers route packets in seconds.
C.TTL is measured in milliseconds, whereas most routers route packets in hops.
D.TTL is measured in seconds, whereas most routers route packets in milliseconds.
9.An SNMP Protocol Data Link (PDL) type 3 is which type of command?
A.GetResponse.
B.GetRequest.
C.GetNextRequest.
D.SetRequest.
10.Within the Encrypted Security Payload (ESP) extension header, which of the following ensures that messages end on a 64-bit boundary?
A.Sequence Number.
B.Payload Type.
C.Padding.
D.Security Parameters Index (SPI).
