Questions related to OSI model

Q1- which layer is responsible for framing ?

a- data link layer     b- network layer      c- transport layer            d- Physical layer

Q2- ICMP is a ..................................layer protocol .

a- Application layer       b- network layer     c- physical layer      d- trasnport layer.

Q3- Which is transport layer protocol ?

a- tcp          b- http           c-   IP               d- ARP

Q4- Which is the responsiblity of presentation layer ?

a- segmentation       b- framing         c-   encryption      d-   error controll

Q5- Router is a ...........................layer device .

a- physical layer   b- data link layer  c-  Network Layer     d- Transport Layer