Chapter 27 Flashcards
Does router have an IP address and does every interface of router have different IP address
Yes
What is multi home host
A host with multiple connections. If one path collapses then host can access to another path. Multi home host have multiple IP addresses on multiple connection.
What is binding protocol addresses
Converting IP addresses to hardware addresses
What is address resolution (binding)
The process of conversion of IP addresses to hardware addresses is called address resolution.
Can a host on one physical network do address resolution of machine on another physical network
No. Physical network should be the same. Router do this job.
What are 3 address resolution techniques
- Table lookup
- Closed-form computation
- Message exchange
What is table lookup address resolution technique
A table on every host contains mapping of all IP addresses. IP software search in table and find the right value.
What is closed-form computation address resolution technique
It works for configurable hardware addresses. Whenever an IP addresses arrives, simple mathematical operation done and by doing that it can recover the hardware address.
What is message exchange address resolution technique
Computer broadcast messages to network. The intended recipient do the required processing.
Does table lookup and closed-form computation are local techniques whereas message exchange a distributed technique
Yes
What are 2 parts of array of table lookup
- IP address
2. Corresponding Hardware address
What are 2 standard implementations of address resolution with table lookup
- Hashing
2. Direct Indexing
What is hashing
We convert strings into fixed length value
What is Direct indexing
Direct indexing works when IP addresses are, from a compact range.
What is the formula of closed-form computation for converting IP address to hardware address
Hardware address = ip_address & 0xff
