Both Metallic and Ionic have similarities both have poor conductivity, both have high melting point.
Both tends to have double and triple bonds. Both tends to have poor conductivity. Both tends to have high melting point. In metallic bonds the electrons are removed to form a sea of electrons same as ionic bonds in which removal of electrons is to form ions. Later these electrons are used or shared by every single atom and in covalent bond electrons are shared by two atoms. So metallic bonds are similar to both ionic bonds.
So we can conclude that: Both Metallic and Ionic have similarities both have poor conductivity, both have high melting point.
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