Evaluation 7 Flashcards
(10 cards)
[Unit 7] In the network layer, the Internet can be viewed as a collection of networks or _______________ that are interconnected. There is no real structure, but several major backbones exist. These are constructed from high-bandwidth lines and fast routers. The biggest of these backbones, to which everyone else connects to reach the rest of the Internet. (Do NOT write an acronym.)
Autonomous Systems
[Unit 7] Since the prefix length cannot be inferred from the IP address alone, routing protocols must carry the prefixes to routers. Sometimes prefixes are simply described by their length, as in a ‘‘/16’’ which is pronounced ‘‘slash 16.’’ The length of the prefix corresponds to a binary mask of 1s in the network portion. What is this mask called?
subnet mask
[Unit 7] There are five goals of Mobile IP. Write one of the goals.
No overhead for mobile host at home
[Unit 7] Handling the general case of making two different networks interwork is exceedingly difficult. However, there is a common special case that is manageable even for different network protocols. This case is where the source and destination hosts are on the same type of network, but there is a different network in between. What technique is used to handle a connection between different networks?
a. connection-oriented technique
b. tunneling
c. bridge
d. forwarding
tunneling
[Unit 7] Each network or link imposes some maximum size on its packets. These limits have various causes among many issues. What is NOT an issue?
a. operating systems
b. addressing
c. protocol
d. reduce error-induced retransmissions
addressing
[Unit 7] Each IP packet is sent with its header bits set to indicate that no fragmentation is allowed to be performed. If a router receives a packet that is too large, it generates an error packet, returns it to the source, and drops the packet. What is this strategy called?
a. dynamic fragmentation
b. fixed fragmentation
c. path MTU discovery
d. IP packet discovery
path MTU discovery
[Unit 7] There are five optional fields for the IP version 4 protocol. What is NOT an optional field?
a. security
b. record route
c. control
d. timestamp
control
[Unit 7] The problem of running out of IP addresses is not a theoretical one that might occur at some point in the distant future. It is happening right here and right now. The long-term solution is for the whole Internet to migrate to IPv6, which has 128-bit addresses. This transition is slowly occurring, but it will be years before the process is complete. To get by in the meantime, a quick fix was needed. The quick fix that is widely used today came in the form of ______________.
a. IP extension
b. address extension
c. network address translation
d. IP translation
network address translation
[Unit 7] Each router that is connected to two or more areas is called a(n) ___________. It must also be part of the backbone.
a. internal router
b. boundary router
c. backbone router
d. area border router
area border router
[Unit 7] the Internet is made up of a large number of independent networks that are operated by different organizations, usually a company, university, or ISP. Inside of its own network, an organization can use its own algorithm for internal routing, or ________________.
a. interdomain routing
b. domain routing
c. intradomain routing
d. outer routing
intradomain routing
