F () The network portion of an IP address is the same for all the hosts in a sub
ID: 3819957 • Letter: F
Question
F () The network portion of an IP address is the same for all the hosts in a subnet. T () Different ASes could use different intra-AS routing algorithms. F () In distance-vector routing algorithm, each node has a map of the entire network and determines the shortest path from itself to all other nodes in the network. T () In BGP, destinations are either hosts or Carried prefixes of a subnet or a collection of subnets. F () Hub, switch and router are all store-and-forward devices. T () The entries in a switch table is built automatically without any intervention from a network administrator. F () Consider a router with multiple ARP tables, one for each of its interfaces. No two of these ARP tables can contain the same LAN address. ? F () Pure Aloha can achieve higher efficiency than Slotted Aloha. F () In CDMA, the chipping rate is typically the same as the original data rate. T () Consider indirect routing for mobility management. The care-of-address of the mobile node can be always hidden from the correspondent. F () In order to protect message integrity. Message Authentication Codes (MAC) can be used, which adopts public-key cryptography.Explanation / Answer
Solution:
1. The network protion of an IP address is the same for all the hosts in a subnet.
True.
Explanation:
An P address is 32 bit long and made up of two components, a network portion and a host portion. The network address is used to identify the network and is common to all the devices attached to the network. The host address is used to identify a particular devise attached to the network.
2. Different ASes could use different intra-AS routing algorithms.
True.
Explanation:
Routers within an AS use an IGP(Interior Gateway Protocol), which handles routing between nodes inside the AS. Common interior gateway protocols include RIP, OSPF, IS-IS,EIGRP as well as some proprietary protocols such as IGRP.
Routing within an Autonomous System(Intra-AS routing) is internal to that AS and invisible to those outside it. The AS administrator decides what routing algorithm should run within it.
3. In distance-vector routing algorithm, each node has a map of the entire network and determines the shortest path from itself to all other nodes in the network.
False.
Explanation:
The distance-vector algorithm is iterative and asynchronous. Each local iteration is caused by 1. local link cost change., 2. Distance vector update message from neighbour.
It is also distributed: Each node notifies neighbours only when its DV changes, neighbours then notify their neighbours if necessary.
4. In BGP, destnations are either hosts or CIDRized prefixes of a subnet or a collection of subnets.
True.
Explanation:
The BGP(Border Gateway Protocol) is the routing protocol of the internet, used to route traffic across the internet. The current version of BGP supports both IPV6 and classless inter domain routing(CIDR).
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